The M-unit simplifies wiring by replacing the OEM wiring harness with a single control box. All the wiring becomes "spoke and hub" type,
very simple. The Chronoclassic is complementary to the M-unit. The heart of the Chronoclassic and Classic are the same and the information on my blog is directly applicable to your Bonneville build. The job requires planning on your part; it's going to be expensive if you get a mechanic to plan and execute the wiring for you. You're searching for a fabricator and these days, they don't come cheap. If you want to bounce some ideas off me, I'm willing to share my experience with my bike build.