Wiring problem peugot boxer 1998

Hi, going slightly mad trying to find information on this. I have a peugot 2.5L Boxer, while checking underneath and renewing protection there I found a wire hanging down by the front left wheel. This wire has been cut in two places probably wear and tear. I can easily repair it BUT there is a small black object in it which I have no idea what it may be, not even sure what the wire is for as it disappears into the wheel assembly, brake, speed sensor ?? No idea. Anyway can anyone tell me what the small black tubelike thing is, it could just be a connector but the wire has come away from the top end and i can't see any way for it to pull apart as a connector would. I can replace the wire easily but this thing could be anything and I don't have one of whatever it is. Help :)