Well, the wiper motor is held to the thick plastic lower cowl panel with 3 bolts. Then that bolts to the car body. (I think it sits more to the driver's side than the pass. side). Then there are 2 upper cowl panels that screw to the lower cowl panel. (Make sure the wiper linkage is hooked to the motor and the retaining clip is installed before you put the uppers on.) Note that they changed the design of these panels at some point (92-ish?), so you should make sure you have the right ones. Or remove the wiper motor from the new panel and put it on your old one.
Anything else you needed to know?