Simple ls wiring questions

[upon1]

I'm putting a 5.3/4l60e in my '54 and can't get a hold of the guy that built my harness. I'm using a haywire chassis harness and a universal ignition switch. And a lokar shifter
Couple questions:
I have a wire labeled neutral safety, I don't have any connectors for the factory gear indicator on the drivers side of the trans. Where does this go?

Do I need to hook the brake switch wire up to get it running?

Thanks in advance.