I don't know your car - a Haynes manual from Amazon will explain it but.... The wiper motor needs to be very close to the wipers with its drive shaft in the same physical plane as the shafts of the wipers themselves. This palces it in the engine compartment close to the bulkhead and high up near the windscreen. If it were somewhere else it would need complicated and expensive linkage to drive the wipers.
What makes you feel you need to replace the motor if you don't know where it is and haven't tested it?
When the wipers failed on my Golf it was just the linkage jamming up because the motor mounting bolts had loosened - I cut hole in the fibreboard valance and just tightened them up - quick fix but not very elegant.
I hope your solution is inexpensive.
Good luck...
Peccavi, January 2010