Yeah, F64's diagram s hows the fuse I'm talking about on the wire he highlighted, coming right off the battery. It's in under the seat, above the battery, in a "loose box". By "loose box" I mean that it's not a part of the fuse box and it's not bolted down to anything. One of the wires is the accessory wire and the other is the hazard relay wire.
Not all of the Ps still have it after decomissioning, because like I said, they tend to do butcher jobs and get over-zealous when removing stuff, and it LOOKS like an aftermarket box just hanging out under the seat, so it often gets cut out during decommissioning.
It's a little black plastic box with just a couple wires going in one end and I forget if it's 1 or 2 wires going out the other, but two of the wires coming out are white with blue stripe like he said. The box is easy to open and there should be two fuses in it. One for the hazard relay and one for the front fairing accessory wire.
If you need I can take a photo of mine. Just right now I have the bike all wrapped up because the alternator cover is off and waiting for a new rotor, and it'll be a bit of a pain to undo that, but I can if you need.
KZs I own
1982 KZ750-H3 LTD (frame's bent, no longer rideable, RIP)
1982 KZ1100 LTD Shaft (thought it was a Spectre)
1988 KZ1000 Police
1989 KZ1000 Police (basket case)
2002 KZ1000 Police
Non-KZs:
1983 Hondamatic 450
2001 Honda Rebel
I don't understand soup. Put a flower on my nose.