On the WJ its just mounted besides the blower motor, seen up from the passengers foot well. Maybe on the wrangler its the same. Not sure if it has just connectors, or that the wires have to be soldered. In the last case, take care to connect the wires correctly, otherwise the fan can rotate counter wise and will only produce noise and no air.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.