Anderson Power Poles shell

There are four sizes.  Small, for TrueSDX power cable, Small twin, for Yaesu FT-817 or similar size cord, 12 gauge and 14 gauge twin power cords.   They are in half shells, so print two of the size you need.   They take M4x12mm screws. 
Dimensional accuracy varies on hobbiest printers.  Mine is calibrated to within 1/100th mm and I included 0.1mm clearance all around.  If your print is too tight or too loose, simply scale the model by 1 or 2 percent in your slicer before printing.