A picture of the unit would help. It would depend on if the surge protector is a outside weatherproof one or if it has to be put inside out of the weather. If outside type then it would be a easy matter of getting adapters and hard wiring the adapter to it so you could plug in to a campground or rv park outlet and then plug your rig into it.
If it is a inside type then you will or should have a wiring diagram / schematic to see where you can hook it into the wiring on your rig. I assume your rig is also 50 amp. Post a picture of the surge protector if possible and the name of the manufacturer.