The metal guts are in place for the connection. One just needs to open the slots and hole for the typical US 15 amp plug. The other alternative is to install a real outlet versus the super cheap RV outlet Airstream installs.
I replaced all the Airstream outlets with the Hubbell 20 amp rated GFI shallow duplex outlets.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels