I can not figure out where these two interior chest pieces go or what they're supposed to connect to.

I was only going to build the legs tonight, but I did and I wasn't sure I had all the waist parts aligned properly so I thought I'd go ahead and do the torso so I could get in place and make sure I had everything correct, but then I hit these two weird pieces and it's late and I might just go to bed and hope it makes sense in the morning