Would my 1st Gen have a factory plug for a brake controller?

I have just spent like 40min crawling this forum trying to find this answer but I think my search skills are lacking. Apologies if this is somewhere already.

I have a 2000 Tacoma Xtracab with the 3.4 M/T. I'm 95% certain I have the factory tow package (although at the rear the wiring is trashed). Im trying to determine if there would be a factory plug/harness for connecting a brake controller somewhere in the cab. Everything I find online seems to be for 2nd gen or newer. I found a white 6 pin connector that only has 5 active pins (only metal in 5, one empty) and 4 wires leaving it. Red, Green, Aqua?/black or brown and White/black. This makes sense to me, as it'd be combining the brake/stop into one conductor for a 4-pin trailer connection.

I just want to confirm before doing this. Does anyone know who would make a harness to connect to this?