1998 Nissan Frontier XE 4WD Speed Sensor Tranny

Can anybody give me location. I’m wanting to change the speed sensor (transmission, manual)
I know from the name it’s in the tranny or transfer case. So when I get under there to change it I find 3 different 2 wire terminal plug ins threaded into the transmission so now I don’t know which is the speed sensor.
There’s one threaded in up at the front of tranny right side /passenger) and 2 more threaded in further back right side passenger. Anybody able to tell me which is the speed sensor I’m wanting to replace.
I have the repair book for the truck but it says nothing about this sensor location

Thanks