LOl- no need to imagine.. here it is..




As for the coin mech... I finally got into the WORLD CHAMP with a universal key ( drill).. Mines a timber door but mechs should be the same, game is from '58.
Here's the outside..



And then inside..



A standard coin mech fits between the chute and where the coin box would have sat on the bottom. On RHS is the slug rejector. My mech has been removed and to add credits a simple push button has been installed inside the machine... button through the front door would have originally been a metal plug with the leaf switch behind acting as tension.

So all you need is a chute and standard coin mech for an EM machine... if you don't have one, I seem to have about 20 or so and can flick you one no problems