First to get your wires ready

You will want to cut up 2 breadboard wires so that you have 2 wires with a male end and 2 wires with a female end. You may want to color code them so that you can easily identify positive and negative. Once you have all 4 breadboard wires cut, strip and tin the ends of the wires.

Now prepare another short wire about 4-6 inches long that will be used to wire the 2 LED's in series. Again, strip and tin the ends with your iron.

Now to get your LED's ready

Cut down the legs of the LED, and tin both of the leads.

I use a 3d printed solder fingers tool to hold my LED's while I prep them. The design can be downloaded here.