Thanks guys for posting the above info. I just replaced this same switch in my 2008 Toro Powercurve 1800, and you comments helped me get it done.
Just for anyone else trying to do this switch replacement, I did figure out how to remove the wires from the old switch:
I found a very small flathead screwdriver for eyeglass screws in my drawer, and by inserting it into the opening next to each wire and pushing it in to the bottom, I released the clip holding the wire so they can be removed from old one, and then in similar manner inserted into the new one. Be sure to put each wire into the same spot on new one to maintain voltage continuity.
The transfer into the new plug also uses the small screwdriver, without the small screwdriver in the hole, the wire will not slide into the new one. So insert screwdriver into opening and slide the wire tip along the side of the screwdriver until it goes in all the way, then slowly pull out the screwdriver while holding the wire in place.
Again thanks for the tips previously.