Use the top for the armor diagram, use the bottom for Internal structure? Red are worth 5 pts, white are worth 1? Arms, side torsos, and head are counted from the top, legs and center torso from the bottom?
Rear locations for the torso armors will be interesting
I'd recommend adding a third color to allow for 20-pt amounts, otherwise you get a Mech with 50-pts of front armor taking up an entire column.