Left handlebar switch ground

Hi there!

Hoping someone on here can save me a bunch of time. I am hoping to eliminate the left handlebar switch on my '84 ZN1300, but it grounds to the handlebar and the bike won't run without it. I have narrowed it down to one connector (from about 67 that the ZN has coming from that switch), but I am hoping someone can tell me which specific wire needs to be grounded, so I can ground it from the chassis harness directly.

If I am overlooking something major, please let me know what an idiot I am!

Thanks for your help!