Cyberverse Optimus Prime w/ trailer

Hey guys, sorry if this has already been dealt with, but I couldn't find anything other than reviews. I saw Peaugh's review of the ultimate x-wing prime earlier today and must have had Optimus on the brain cause I bought my son the cyberverse one with the trailer. He is just thrilled to have an Optimus with a trailer now. I was messing around with it when he was playing with it and noticed the connecting tabs on the back by the doors.

I noticed when I connected them they made some cool wing style mods. I can't seem to figure out any other purpose for them or the right way to utilize them so I figured I'd put the ball in the experts' court. Are they for attaching to another figure/set or do they actually server some purpose?
I noticed when I connected them they made some cool wing style mods. I can't seem to figure out any other purpose for them or the right way to utilize them so I figured I'd put the ball in the experts' court. Are they for attaching to another figure/set or do they actually server some purpose?