You might have to buy a new clutch, unless you're handy with a soldering tool but I have a feeling that's going to be awful dicey to try and attach a prong where it broke off... You might however, if there's just enough of the stub left, be able to tack-solder the wire lead directly onto the stub that's left of the prong (hoping that made sense), doing so will hard wire things but a new clutch is like $400...
The model number appears to be something you might have to narrow down from this list:
AVAILABLE MODELS CLASSIC INDUSTRIAL
- 2750KW27 HP, 50"
- 2760KW27 HP, 60"
- 3560KW35 HP, 60"
- 4060VGE40 HP, 60"
- 3572KW35 HP, 72"
- 4072VGE40 HP, 72"
Available with a 50", 60", or 72" deck, the venerable Classic zero turn mower from Dixie Chopper truly lives up to its name.
www.dixiechopper.com
Yours being the only 50" that I show on that list, I would assume the model number to be 2750KW (I am guessing KW means they have a Kawasaki, the GE would mean Generac).