1994 Mustang Airbag Mistake 42

Hi,
I am living in the northern part of germany. I am the owner of a 1994 Mustang GT conv. with 5,0L engine. I have a problem and hope, anyone can help.
The airbag-lamp shows "42" = left airbag circuit open. I replaced both crash-sensors and the clockspring, but I failed. "42 is still alive. Then I checked the wirin from the crash-sensor connection (c148) to the end: red = ok, violet = ok, yellow/green = problem. I checked my "Ford Service Publication" CD (for 1995 Mustang) and found out: there should be a connector "C107" in the engine compartment and "C210" inside the car on the left side. OK, C210 was found but not C107. This time I cannot follow the wiring from C148 to the end because the car stands on a ramp, but I've seen two connectors under the left bumper near the firewall. I know, that I have to check all connectors and/or to replace a piece of the wiring, but which? from C148 to the firewall, or from the firewall outside to C210 inside or from C210 to the electronic-box? Can anybody tell me where that F*** C107 (or equal) is?
Greetings
Werner

Hi, I got it! It is a broken wire (yellow/green) at C107, located under the fender near the firewall. But, how can I pry out that little connector, because the wire is broken nearly 3mm before the plug?
Werner