there is typically a hold contact on any starter
when the momentary 'start' button is pushed, the magnet is energized and the hold contact keeps it energized
the stop button is wired into the hold contact circuit, when the momentary 'stop' button is pushed, it cuts the power, opening the starter
to add a 2nd set of switches
the start is wired in parallel, so that any switch has power
the stop is wired in series, so that any switch kills power
screen grab of the diagram posted
Last edited by _Ogre; 10-23-2019 at 03:16 PM.