Arcade power supplies are designed to be installed inside of arcade cabinets, where they are safe from hands, kids, and pets. Supergun users however often use arcade PSUs out in the open, where the exposed power terminals pose a serious safety hazard. 3D printed terminal covers solve this problem by encasing the terminals in plastic, protecting from exposure to dangerous live line voltage.
QCRetro designed a Happ 15 Amp terminal cover: https://www.thingiverse.com/thing:3791090
That design is a remix of one for the Min Hong MH-16A: https://www.thingiverse.com/thing:3464794
Suzo-Happ Power Pro 110W UL, CE Power Supply
+5v 15A, +12v 2A, -5v 1A, 110 watts. UL and CE Recognized. Will accept wide #8 terminal. Dual AC input 115vac/230vac, selectable by jumper. Overload protection.
(as of December 7, 2023 17:11 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)