This is my design for the larger 30 Amp relay to be safely used with the Ender 3, This includes a small box that sits on the back of the printer to house the relay on the rails.
My setup means I had to drill new holes through the metal, if you do this please make sure that there is enough protection as to not tear the cables on the holes, a grommet or in my case extra layers of shrink wrap worked great.
The author marked this model as their own original creation. Imported from Thingiverse.