This first option involves first flattening your partner out, so start by lowering your head and driving into your partner's neck and chest area, and be sure that your elbows and hands are controlling the coveted inside space. Be sure that your hands are controlling their biceps. Next up, choose a side to pass toward. Whichever side you choose, your head is going to go the other direction, and you're going to use your shoulder to drive your partner flat (here it's Trey's left shoulder).

Now kick your right leg back to trap your partner's right foot all the way across your hips. Reach down with your right hand to reinforce the foot trap position (their leg should be crossed all the way in front of their body, not in between your legs at all). Being careful not to flare your left elbow out from your body (lest you get Kimura'd), push your partner's right knee back so that you can pass around their legs to side control. Keep in mind that you need to keep constant pressure on your partner's solar plexus the entire time here, or else they can hip out and start to make frames, utilizing basic guard maintenance. Finally, work up to the head for final side control positioning.