Idea needed for receptacle/socket

Are you running elec or air dump valve air you can use some fittings similar to a shop air hose quick connect if your running elec you can buy a 4 way looks just like the7 way but half the size and only has 4 wires there commonly used to open the gates on belly dumps or running aux on end dumps and such

 

Yea it has two holes for 1/4 bolts http://order.waytekwire.com/productdetail2/M50/37644/TRAILER CONNECTOR 4 WAY/ this is the female for the trailer

 

Yah, that is what I was thinking too!

 

Ive had the 7 pin plugs on my reefer as well as my step for quick dumps, and both are obviously bigger than one inch. You could drill it bigger and go with a ABS plug, call Badger Utility. Better yet get a 4 pin male and female from NAPA like the kind used for little RV trailers. Farm and fleet has them as well. The plug wouldnt really mount flush, rather just dangle, but the wires would fit easily thru the one inch hole.

 

That one will certainly work as well, but Im not sure if itll fit in a one inch hole. Great Dane used this style. NAPA carries it too.