Looks like you got the right belts going by the model number.
Its pretty easy.
2 belts.
Should be an 'A' section from the crank pulley to the pulley on the gearbox, clutch holds it in tension. This belt will need to go on first.
Cutter belt should be a bigger 'B' section if my memory is right. From the crank pulley to the deck. The deck sliding back engages the cutters.
I have 4 of them here in various states of stuffed, When i get time i will have a look under and see if one has belts on it.
