I have my camper on so I can't really get a bed picture of mine but it looks the same as the one in the below link, seems to be the same place it was on the previous gen trucks (back drivers side and high up). I believe it's the same part # as well but I can't be certain. I snapped a couple pics of mine underneath with some part #'s. The connectors look to be the same but I can't say for certain.
https://www.ford-trucks.com/forums/1389746-7-way-trailer-plug-in-bed.htmlI believe you can get the kit from taska, but again I can't be certain it is the same for the 2017 but it sure looks like it.
https://www.tascaparts.com/oem-parts/ford-tow-package-wiring-harness-bc3z13a576aBelow are a couple pics from under my 2017 DRW truck. The plugs are in between the hitch plates on the drivers side.