Most are inside the bell housing, top right corner. (starter side)
You'll see a 2 wire lead coming from inside there kinda toward the front of the trans where it meets the bellhousing.
Check for shorts too, as mabe you'll get lucky and be able to fix it with a bit of wire rather than a trans drop.
Also, on some models which year(s) evade me right now, there's also a switch in or near the shift tower. (literally two switches, as brought to you by the department of redundancy redundancy department)
Does yours have it? Dunno, mabe. :shrug:
If so, then you can eliminate the wiring for the one in bell housing one and work with the much easier to deal with tower version. (make sure yours is that type before getting all happy with the wire cutters or whatever though)