1979 kawaswaki kz750b twin wireharness

i have a 1979 kawasaki kz750b twin, and im looking for a wireharness, im wondering what year and makes can be compatible with my 79' kz750b twin? for like can a non-twin wireharness fit mine?

I doubt it, at least not without a bunch of hacking. I also have a 79 B4 twin and in the US, that is the year they deleted the handlebar light switch.

78 KZ750B3 - 80 KZ750G wiring harness will work. I think I have a 80 750G wiring harness on my 79.

And I do have a headlight on/off switch, I just used a 78 right side switch pod and plugged it into the 80 harness.