you shouldn't have to solder them if you are not up to doing it...most replacement switches have tab connectors that will accept clips...then if you have a crimper, you can just get the crimpable clips at an auto store or hardware store. if you can solder, it makes the connection stronger in most cases..just make sure the switch is the right size hole. also, i believe with mojo's you only need an off on switch, not an on, off, on switch. make sure the threads are metal on the shaft of the switch, plastic breaks pretty easily..also use loctite on the threads to prevent the nut from falling off and the switch pushing back in...
if you need any help, let me know