How should an RV surge protector be connected for Pebble charging?

Joining the party late, but we've been using a 50A Hughes Power Watchdog for campsite charging with our EV for years and have also used it at every camping stop with the Pebble too. No issues. We plug that into the pedestal first thing upon arriving at a new campsite to get a quick readout on whether the pedestal has any problems. Picked up that habit after an experience or two getting our trailer all snugged in and set up and then finding out we had a bad pedestal and had to move to another site and start over.