I've tried various searches and all I can find is some vague references. I have a nickel slot on the far left (blocked, and pressing the switch on this mech starts a game as opposed to awarding a credit) and a quarter slot on the far right that awards 2 or more credits per quarter depending on the 3rd slot settings inside the lower cabinet. I know it's possible to setup EMs for .50/play as I've seen them this way before but I can't find any info on how I might actually go about doing so.

So according to the manual, the nickel coin chute can be set to accept two coins for one play. Unfortunately, the switch on that mech is simply starting a game, not adding a credit and I don't see any reference to which plugs on the cabinet mounting board go where in order to set it up properly. None of these plugs are identified in my cabinet other than ones for the 3rd coin chute setup.