Leslie, you sound like me a few years back - electrics definitely not my strong suit. But, I think you have no alternative to getting to grips with the bike's electrical system. You will need to trace those wires back - the white, brown/white, green blue. Two of them are likely to lead back to the dip switch on the l/h handlebar? Tracing back further, the dip switch is fed from the lights on/off switch on the r/h handlebar. The feed to the on/off switch should be live when the ignition is on, so if not trace that back further.
I find it very helpful to make sketches and notes on, well, I use A3 field drawing pads coz there's plenty of space. Get A3 pads cheap in The Works or Home Bargain stores or similar. It would be a good idea to get yourself a multimeter. When I bought one, I had no idea how to use it but they are simple devices and useful to check continuity, so you know your looking at two ends of the same wire.
The red, or it might be the blue, feeds main beam and the other feeds dip, and black is the common earth. Get it wrong, just swap the connectors.
Personally, wouldn't go with those chocolate block connectors. Go to somewhere like Vehicle Wiring Supplies online and you can buy Japanese style bullets - you need to buy male, female, plus male insulators and female insulators. They also have every colour of tracer wire and tons of other stuff. And of course other suppliers are out there. With the bullets, you also need a crimping tool and a good wire stripper will be handy. With a bit of practice, you can make good secure connections. With the plastic insulators, they are better protected against damp. Though, having said all that, looks like you're making a very neat job with those multi-connectors and heatshrink.
The apparent complexity of the bike's electrics starts to vanish as you trace the wiring out and gradually get an understanding. Or maybe you are already getting there and I should shut up? Good luck!