ports

What is this plug right above the shift linkage for? Could i possibly use it for my trans temp gauge? Thank you 90’ Ranger A4LD

i recently got a 2006 ford ranger. the guy i bought it from said it was originally a truck for a power company. on looking the truck over, i found some interesting things, one being a little silver box behind the drivers seat. it has ports on all sides, they are labeled: PW BZ, L and R, LED, L/R...