They might be more comfortable with some better hides (those ones are pretty open) and as someone who doesn't think cohabitation is a safe practice, I hope you're planning to split them up outside of breeding.

Though I'm a little perplexed how either of these snakes could produce a Chocolate since they're both obviously normals. I think you may have had your leg pulled just a little there or the seller does not know what a Chocolate BP looks like.