In the image below there are a pair of holes on top of the pin box towards the front of the unit. Do they serve a purpose? I'd like to plug them as they let water in and rusty water is starting to run out onto the hitch and truck bed.
Happy Motoring Bob & Deb
W Ma. 12 F150 HD SCAB EcoBoost LB 4x4 14 Escape 5.0 TA