We did do a video that covers a few splicing and soldering techinques, but its easy to miss cause its title is about heat shrink. Anyway here is a link kzfaq.info/get/bejne/n9J2dbSlkrLQiqM.html

The m-Unit manual does list recommended wire gauges, but their suggestions are very conservative (meaning, they specify larger gauge than necessary). On our builds we use 18 gauge copper TXL with cross linked insulation for the output wires, and 22 gauge for the inputs. The main power feed wire gauge is best determined by the main fuse you are using, on our bikes we go with 12 gauge wire which is rated upto 40 amps.

If you work on old bikes you'll see all kinds of butchery, and some of the absolute worst work comes from so called professionals. We've seen bikes that came from known specialist restoration shops that claim the bike is as close to factory perfect as possible only to find a .015" piston/cylinder clearance, and a piston that was clearly run with a broken valve, and push rods made of hardware store aluminum tubing. They were betting that the bike was going to a collector or museum, never expected anyone would ever try to ride it, or check their work...criminals

The circuit breakers do not fit in this fuse holder. Unfortunately the cap is too small for them to fit. However, it you wanted to use this fuse holder without the cap it will work with standard circuit breaker fuse replacements. Just note that the fuse holder that comes in the Deluxe Cable kit is for a standard blade fuse size, but the multi circuit distribution modules use mini blade fuses.

Working on it!

Tinning with solder works, and is way better than stuffing loose strand in the terminals. But it still leaves potential for fatigue failure where the tinning wicks into the insulation. Tin + heat shrink would help support the transition and reduce the potential for fatigue failure.

Revival Cycles jaulllllllllll

So if you pay close attention to wicking and you use longer heat shrink would be ok?

Yes this is ok, the ferrules are a nice touch and my preferred method, but if those weren't available tinning and heat shrink is the next best option.