I saw someone at a recent with theirs mounted on the pinbox as well. I wondered what that blinking red light was at night. Guess they didn't install a switch in their power line.My repeater is mounted to the pinbox with an on-off switch pulling power from the junction box and with a switch mounted right above the junction box. Both the switch and repeater are use 3M body side moulding tape to attach.
(red arrow points to repeater)
I like the pinbox idea as it meets the goal of getting it forward mounted, is outside of the RV and has super easy access to power. Thanks for sharing.