I know the plugs under the cab are for puddle lamps but what are these other ones for?

There are two on the driver side of the hitch behind the bumper. There is also one in the front drivers side frame behind the front bumper.

ETA. Read a thread posted down from this one that said the plugs on the rear hitch are for the optional in bed electrical hookup.

 

One of the unused plugs up by the spare tire is the connection for the Aux or trailer camera. The other I’m not sure.

 

Mine is an XL trim, but it does have a locking tail gate and backup camera. I'm really hoping that one of these is for the in bed lighting. That'd make it easier to add.

 

One of the connectors is for bed lighting and there is a thread with lots of different ways of doing it.

https://www.ford-trucks.com/forums/1...-retrofit.html