Tbh if it were me...
I'd bridge out the side stand, then test it, bridge out the clutch switch, then test it. After that I'd dismantle the TOS and make sure everything inside is as it should be. After then possibly bridge out the kill switch, and continue in that vein.
My method of electrical problem solving has always been by process of elimination, then whatever you are left with must be the fault, regardless of how unlikely it might seem.
Somewhere I have a full colour wiring diagram for a TL1000S race loom. I will dig it out tomorrow and post it, that may help by isolating things that it couldn't be.