MP Geoff Brock says he will not be swayed by 'death threats' or abuse about his deal with Labor to give it a fourth consecutive term of government in South Australia.

Mr Brock, the independent member for the country electorate of Frome, is getting key ministerial roles in the new Government and says he can give regional issues a voice in Cabinet.

He says ministry roles were offered by both major parties during his talks with the leaders, not demanded by him.

Mr Brock says regional South Australians should approach him with any concerns rather than leave threatening or abusive messages, which also have an impact on his family and office staff.

"If you've got an issue I'm quite happy to discuss those issues with you logically, face-to-face, instead of ... abusive phone calls," he said.

He says one late-night caller to his Port Pirie office was surprised the MP personally was there to answer the call and went away with a different perspective on events after talking issues through.

"When I explained the situation would be 23-23 (if Mr Brock aligned with the Liberals), no-one could form government and explained the scenarios with the situation of caretaker mode, the consequences of that for the state, the consequences for the ... business community, lack of confidence, and then he had a different idea of the whole thing," he said.

"If I had sided with the Liberal side, there wouldn't have been a government in SA, full-stop."

Mr Brock says police have been made aware of details of some of the threats he has received.

He says a phone monitoring system has been installed.

"I've had some threats against my life by phone calls so if somebody comes in and it's an abusive call we can trace that call now," he said.

Brock planning a road trip to discuss concerns

Sorry, this video has expired Weatherill given consent to form government ( Nick Harmsen )

Mr Brock says he now needs to be given time to understand and settle into the new ministerial responsibilities before tackling the issues confronting South Australia, and regions in particular.

He says he is planning a road trip in the near future to discuss a range of issues with councils, regional development boards and others.

"I am the member for Frome, I'll push for them as much as I can, but I am now the minister of regional development - I'll be pushing for all regional areas and I will not be taking any favours at all," he said.

The MP says the future for the Nyrstar lead smelter at Port Pirie must not become a political football as a result of his deal with Labor.

"Leave Nyrstar out of this as a political football ... It is a big issue for Port Pirie, the region, it is a big concern for SA in general and we don't want another industry to go down and I don't think anybody in Australia wants that either," he said.

The issue of volunteer workers being entitled to the same compensation as paid employees for work-related cancers has been contentious in South Australia for some time.

Legislation was passed covering paid firefighters but excluded thousands of volunteers.

Mr Brock will push for a taskforce to investigate extending the cancer compensation rights to Country Fire Service volunteers.

Speaking with reporters, Mr Brock again made clear he had never been a member of a political party and said his deal with Labor did not mean he would be joining the ALP.

"I have the opportunity to vote as I see fit ... I will be attending Cabinet but I won't be attending Caucus," he said.

Mr Brock concedes he made a mistake last weekend by failing to ring Liberal leader Steven Marshall before siding with Labor, but says no deal with the Liberals could have secured stability for the state when there was a hung parliament.

"I apologise to Steven, it was an oversight on my part," he said.