I used a piece of scrap aluminum.
I bent it and painted it (with a sharpie)
I used one of the origional holes in the chassis to mount the plate and drilled a new one as well.
once the plate was secure, I double side taped and zip-tied the MMM to it.
as it turns out, it wasnt a bad idea
waiting for mt MMM V2.2
at least I didnt melt the plastic chassis...