Hi...a standard power connector for 110/120v to control quite a few normal machines, from printers to PCs, chargers, and advertisement infinitem.
Another is a XT60 connector - additionally exceptionally normal and standard. Google XT60 connector, or your nearby interest shop will have the two closures or combines in stock. Pleat connectors are acceptable, you can even get ones with recoil wrap tube, across the board, to make a water-tight association.
Any neighborhood hardware supply will have this stuff as well.