The connector would have to have strain relief built in ... bar that would be crimped down onto the cord jacket after the electrical connections were made. The design would soon be refined ...

A metal electrical box A metal box cover with a center knock-out A strain-relief cord connector Electrical connectors A cord receptacle A short length of stranded-wire ...

Hirose’s HR22K series of IPX7-rated bayonet lock connectors are suited for harsh environments in industrial and manufacturing ...