78 750K Keyed Ignition to Switch

[DRH750]

Hey guys, I'm building a cafe bike out of a 78 CB750K. I'm looking to clean everything up and replace the keyed ignition switch witth a toggle switch. I have the plug from the bike and was wanting to know what wires I need to hook to the switch and how many terminals I need on my new ignition switch. I don't care about the 'park' feature or anything like that. I just want to flip the switch and the hit the factory start button and be off. Thanks a lot guys.