I have started to fabricate a plate to hold the fuse boxes, and relays. It is easier going forwards to mount all the fuses and relays, so that if needed in the future it can be removed and serviced outside of the chassis.
Using some 2.5mm thick aluminium plate, the battery terminal hole and indicator relay mount were drilled M6.
The fuses and relays were drilled M4, I have made another hole in case I needed to fit another relay at a later time. While the plate is being fabricated I may increase the number of relay holes.
I intend to countersink the holes from the rear, so using M4 counter sink screws, this plate can then site flush against the front bulkhead. The photos show the grey plate, i intend to remove this grey paint, to leave a brushed aluminium finish.