Conntek RL14825 RV Generator Adapter 1.5-Feet for Model L5-30P 30-Amp 125-volt Locking Plug to RV 30-Amp Female Connector
RV Camp Power Pigtail Adapter Cord, NEMA L5-30P to NEMA TT-30R, 2 Pole 3 Wire Grounding, 30A Locking male plug to RV 30A female connector  Approval: Plug and STW: UL, C-UL.