Magnavox Micromatic component swap out

I just got a Micromatic component unit. I bought it knowing the existing 2 speed unit doesn't work (it's very dirty and gummed up.) I'd already planned to remove this unit from the plinth and drop in a 60's 4-speed version and use it on my current component stereo system. Here's the question:

When I acquire a Micromatic unit off Ebay and drop it in the plinth, how do I create a normal power plug? Underneath the console decks is a 3 pin modular connection for power to a console. The wires are usually yellow, black and red. Which wires do I use to create a normal power cord? Thanks for any help!

First, check if the new console has the same arrangement.

If it doesn't, trace the wires:

- One color of wire will go to the switch, and nowhere else. This is the hot wire. It goes to the small blade of the power plug.

- One color of wire goes to the motor, but not the switch. This is the neutral wore, and goes to the large blade on the plug.
If the amp socket exists, it also goes to the large blade

- One color goes to both the motor and the switch. This is the amp feed, and goes to the small blade on the amp socket, if it exists. If it doesn't exist, tape the end of the wire with electrical tape so it doesn't short.

On mine, the black wire is the hot lead, the yellow wire is the switched feed for the amplifier, and the red wire is the neutral. But check the wiring first.

If you provide a 3rd-prong ground wire, put a solder lug on the end and fasten it under a screw on the plinth. Make sure it is not in the way of any moving parts.

You will find that the cutout for the changer is different. You may have to replace the mounting board or make new cuts in it. The old change cycle cam is much bigger, and the linkages are in different places. The transit locks and springs are moved too.