I was changing the oil on my 08 5.4L F150 today and noticed an odd unplugged red cable by the front of the transmission. It has three female holes in it to be plugged into somewhere, the only trouble is I cannot for the life of me find anywhere around the area to plug it into. When I bought the truck, the engine and transmission were both swapped, and I'm thinking it could have been unplugged this whole time. Anyone have any idea what this could be?

 

Where does the other end go?

 

Cant seem to find it, gets lost pretty quick going towards the engine and I dont have a scope camera at the moment

 

Block heater possibly?

 

Yup, its definitely for a block heater that probably isnt there anymore. I appreciate it