SILATU Dryer Plug Adapter with Ground Wire, 10-30P Male Plug to 14-30R Female Plug

3 Prong to 4 Prong Dryer Adapter 30 Amp to 30 Amp Up to 7500W SJTW 10/3 Generator Cord, UL 

This was used briefly, but we moved to a house with the connection we need.