.... it's down by the tank. Its a 75 CB 550 K. Does that help at all?
If it is down by the tank, I'm going to guess that it is just like my 500. Steve (or anyone else) can you confirm this?
A 3 position switch. Off position to left, nothing operates. Second position - center, everything works, ignition, electric start, lights, etc. Third position to right, parking lamps only, no ignition, no electric start. Key can be removed in first and third positions.
No steering lock is incorporated into this type switch.
Does that sound like it?
Can't tell you about wires, don't have the 550 diagram.