Large Wire Near Starter, Where Does it Go?

[Zambuzan]

So here I am, merrily doing a trans swap and taking the time to replace my starter like any responsible DIYer should “while you’re in there.” I popped off the three nuts and wires holding on the starter and when I got the starter out of the way, I noticed a larger wire in the same bundle with the starter wires... I’m pretty sure I didn’t unbolt it (maybe it was sandwiching the 16mm trans bolt??)

So where in the world does this connection go to? I highly doubt it’s to the starter, but it does look like a ground wire. Here’s a pic for reference...

[Zambuzan]

Ok upon further research, it seems that large wire shares the same terminal as the 13mm (red) wire. Guess I didn’t realize that when removing the old starter... whoops hehe