Behind the passenger side kick panel, inside the car.

BTW, it is very unlikely that the ECM is your problem as the car will start just fine with it unplugged. Spray some starter fluid down the intake if you think fuel is the issue. If it trys to start, look at the fuel supplY: pump, pump relay, fuel pressure, etc. If the starter fluid changes nothing, look to the ignition.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician