Ok I'll take a shot at helpin' ya, if I understand correctly your starter does not turn when the start switch is pushed. At least that is what I think you are describing.
There are many possible causes for this other than the starter. You have to examine the battery, start/stop switch, safety lanyard and safety switch, starter solenoid, plus all the wiring and their connections. Don't get discouraged it isn't that hard to do on a ski. Just take it one step at a time and soon you will know the problem. But don't stop once you find one problem finish troubleshooting the entire system as there are often two or more problems, especially on older skis.
First get yourself a copy of the wiring diagram for your ski. It will give you a road map of the system and a better understanding of how the components work with each other. Personally I start at the battery and begin working my way to the starter following the flow of the electricity and checking each component along the way. If I identify a bad component I then need to determine if the component is bad or are the connections and wiring faulty.
Since I do not have a 94 xp (mine are 95 xp and gtx), I am not familiar with the 5 prongs you have. Both mine have 4 connection points. Perhaps a pic will help.
Hopefully I have given you enough insight to get started on this weekend.
Oh welcome to the world of SeaDoos and the forum from another newbie here. And a little advise try not to get yourself hurt, I damn near did before I figured out the xp are crotch rockets.
And if I am too far off base with my suggestions someone will be along shortly to correct me.