Summary

Bus bar for 100mm x 100x copper plate. Will work with any thickness of plate as long as your screws are long enough.

Bolt nuts are push fit so they don't drop out when removing cables.

Center bolt and nut is not for lug connections but to hold the plate against the mount

Added screw stand offs in case bolts are too long and the mount is not flush against the wall.

Mont is made for standard M8 bolts and nuts

For those wondering, the thickness of plate I used is 4mm with 10m holes. This gives roughly a bus bar capable of 250amps easily