battery holder question

[BrianG]

I mounted mine from the bottom as well. If there aren't any chassis holes in the right places, it's just a matter of drilling hole(s) into the chassis, countersinking them, drilling a hole about 20% smaller than the screw diameter so it self-taps into the tray, and screwing it in. IIRC, I used two 4mm screws (using the nitro motor mount holes), and one 3mm screw.