Auto Transmission sensors?

[Darius]

I am swapping in an RB25 and am going from auto to manual in the process. I'm to the wiring stage and need some info that I couldn't find in the FSM...There are four external sensors on the transmission:

1) Revolution sensor (R/W/B)2) Shift lever sensor/brake light switch (bunch of different colors, red is reverse position, for brake lights)3) One by the output to driveshaft (D-shaped cross section w/1 pink and 1 light brown or gray wire)4) One on top of the transmission housing next to the block (1 pink and 1 light brown)

What are plugs 3 and 4 for and do I need them for the auto to manual swap or can i just pull them from the harness completely? Wait, since they have similar wire colors, are they possibly connected? I don't know, I'm getting a little confused.