I wasn't sure if it was purely an alarm or if it had an immobiliser too.
I have some pics, excuse the mess of the wires as I have stripped all the loom to chase all the wires to see where they went.
So the plug where the alarm plugged into the loom
The plug in the picture is next to the cut off switch.
The masking tape is what I have added (also further up the pic) to put the wires close together to help me find them later.
These earth wires are under the fuel tank, and has blue tape. While stripping the loom I have come across lots of wires here and there with same connections and blue tape. For some reason the wire goes in as one then out as two?
Came across this yellow box wrapped up in the loom, not sure what it's for, chased the wires to the injectors.
Back to the alarm plug on the loom.
There are 5 wires
The green wire went to one of the fuel pump plugs, but had a split junction wrapped in blue (see photo of green wires)
The orange wire goes down the left side of the bike by the rear pillion seat, also had a split junction in and wrapped in blue.
The light blue wire went to a grey plug which routed to the left handle bar controls (horn, indicators etc) can't remember if that had a split junction with blue tape. But I think it does when zooming in in picture 1
The two white wires routed to the relay and fuse box and connected to there each fuse but I didn't think to look what fuse it was. But both had split junction wrapped in blue.
I hope this makes sense and gives you an idea.