the battery placement is changed. I saw that there was enough room beneath the old battery brackets to store at least half a battery. So I took some more measurements to be sure. The old brackets had to go! Easy task for the grinder. The battery almost sunk 4 " in the hole that came available. The battery sits almost tight in between the frame. It only needs some better support on the bottom. Fabricating a bracket from aluminum was a quick job. (no photo jet). I only needed a bracket to secure the battery. Nothing good came to my mind. I tried to imagine the finished job. The new routing of the main cables was not I had in mind. Then I knew what it had to be: The securing bracket had to bolted direct to the battery pole. Make the bracket of copper, looks good, guides current well. better ground wire is difficult yo find. This enables the possibility to attach multiple ground wires to this bracket at a convenient place, Out of sight, safe for moving parts.

This good idea only needs copper sheet!?! I had some half kettles lying around. So after some cutting in cardboard I had some templates. 

The last time this was a complete half water kettle.

 After cutting the first bracket, ready for bending.

 I took the time to heat the copper before bending. This material is probably 30 years old and 1,3mm thick. It is more easy to bend as 1 mm aluminum.

First bracket, fitted around rear brake fluid container. All the ground wires will be attached this face at the back.When the battery needs to be removed, all these wires can be left alone.

For the second bracket the same work is done. Cutting and bending:

  This is how the result is so far:

 I added a slit to monitor the fluid level for the rear brake. I need to add more threat holes for all the terminals. Make some kind of bracket for the positive terminal. It has to look the same as on the other side, but bolting it to the frame is not a good plan I'm afraid.