Tackled this job today, located the plug and saw that it was at about the same height as the taillight. Removed the light and it was easy to unplug the lead, thinking it was going too easy i went to pull the cable and plug over the balance weights and there is where it came stuck.
Cable seemed like it was twisted and i couldn't for the life of me get it to come thru, after about 30mins and just decided to cut the cable in a location that was easy to be rejoined if i ever decide to refit it.
On the plus side i now know where i will route the air line from tank to compressor when i get the rest of my fittings.