If you go with the Roadster Cycle mosfet ~kit~ all new connectors with short bare pigtails are included to allow you to wire the new VR in place. Here, take a look ... (scroll down to the "Complete MOSFET FH020AA Shindengen crimp or solder kit")If I had done this in America with a full garage it would have been a different story. This was done in a public parking lot, in Osaka, between 11:30PM and 5:00AM out of a duffel bag. I think it's pretty good for what I had available. 😬
I want that Mosfet kit and may still order it eventually to replace this OEM voltage regulator. I cut the connectors off and hardwired everything, and I'm not sure I could get everything back to the connector now. There were multiple wires of the same color on the same connector, so I went very carefully one wire at a time over several hours. I soldered everything and tried to make the best connections I could so that nothing would burn or melt.
LINK = https://roadstercycle.com/
Good job considering your circumstances ... I've done jobs in all-night carwash stalls before ... years ago a friend of mine helped me install a complete 2" body lift on a Chevy pickup in a car wash stall one night!