Not the best - all I could find - but this youtube shows the location of the kill switch on the 2000 unit.
Under the key you can see a plastic boxy thing with a slot in its top.
Look in from the rear & you will see a two position toggle/flick type switch.
This is the kill switch.
Up is for run, down is for off.
To turn off as that one is pictured use your key through the slot to push it down.
To fit the lanyard hold it so the plastic loop is vertical with the cord at the bottom.
Put the loop over the switch & push the switch up into the run position.
The lanyard should now be hanging down held in place by the switch.
Operates by flicking the switch down when the lanyard is pulled.
An advantage is that if you go overboard with the lanyard it just needs someone in the boat to flick the switch back up to be able to start the engine. Doesn't need another lanyard in position.
BUT the downside is it could encourage laziness as it doesn't need the lanyard in position.
No doubt the OP will post a pic showing something completely different!
Something slightly different - still a Mercury & the same type of kill switch arrangement. https://www.marineengine.com/parts/i...y/881170A6.jpg