I just remembered something, the option port under the seat (on my 2016 CB500F) had a blank plug attached to it for protection. So you may not need to buy one, just the pins and rubber stoppers. It will probably save a pound or two.
I cannot remembered which side was male and which female though, and not in a position to look at my bike right now. But it is a white connector and I think attached somewhere near the pillion seat. Not to be confused with the red connector with a flat cover, which is the diagnostic port to which you can attach a gear indicator.
Also, on some early models (2013–15 I, think) in some countries a four-way connector was used. So not relevant to OldRocker, but best to note it in case anyone with an older bike is also interested.
What spotlights did you both use, and where do they mount.
I bought these…
…because they use the mirror bolts, and because they were cheap enough to not be a problem if they were not good enough.
I would not agree that they are "premium quality" either. The metal mount arms showed rust at the first sight of water. I cleaned them off and rubbed in some ACF50, but then last week after being out in the rain they had rusted again.
And I wanted them to enhance the poor headlamp so I can see more than a few feet ahead the main. As I said, for that they scatter the light too widely. In a confined space they are brilliant, you really notice the difference. On an open road though most of the light disappears into the air. Also mounting on the mirrors is too high, and without risers some of the light is wasted on the back of the indicators.
But if you only want running lights for visibility, so long as you paint the arms to waterproof them, then they seem to be good value.
I did say on another thread I would show pictures, and I do have various photos on my phone but have not had the time to do anything with them. The same reason I have yet to do anything about replacing them even though the nights are reaching into the afternoon.
I think I have a solution for the mount problem though, which is to use the bolts which attach the front mudguard / fender. I will take one off to see what size it is, buy a longer pair I can cut to size with some kind of rubber washer to fit in the recessed part of the mudguard.
I cannot remember the brand now, but I know one accessory brand does L-plates for spotlights which should then allow attaching many types of spotlight. Although if not too worried about the cosmetics, some basic ones brackets from a hardware store should work just as well.
The good thing is my (over)use of bullet connectors means I just need to crimp some onto a new set of lights then replacing the current only is just changing the ones plugged in behind the head lamp.