Rumcam Split2 MB support

Hi everyone !

First of all, I got this idea of designing this print thanks to spam_spam and his "ZOHD nano talon runcam split mini mount".

I made a "remix" of this print for my runcam split 2 motherboard.

This print has two goals : supporting the motherboard and protecting it from the battery during a front crash (when a front crash occurs, sometimes my battery hit the front of the nano talon, hitting my runcam motherboard).