Search Gerry's forum posts. He has done a lot with electrical. Most electrical problems stem from dirt/crud/oxidation in/on old connectors, and less than stellar wiring.
OEM style connectors and pin removal tool(s) can be had from Amazon and eBay as well. Get a good crimper - ratcheting type, wire stripper, and pin crimper.
Shrink tube for connections is a must. If using solderless connectors, spring for the heat shrink variety. The heat shrink on these connectors helps keep the connector joined.
Most common OEM style connectors you will use are 2/3/4 pin. Don't throw old ones away, clean and reuse.
Recommend removing any non-OEM wiring and get back to the basics. Once this is done, and you want to add items, nice to haves, use an accessory fuse box that is powered through a relay. Get the fuse box that has the power and integrated ground bus. This allows you to disconnect these circuits when things happen, and you only troubleshoot the original OEM install. Splicing into a wiring harness designed with the minimum sized wire to operate the electrical system safely as it came from the factory is not always a good idea.
Agree with Kerry regarding the stator wires; however, a good waterproof high amp 3 pin connector from a marine chandlery will work very well. If your bike has the original connector, a new one will outlast us both.
A good place to mount this fuse box is in the rear trunk.