Yes, it is the connector with the closed loop.
OK I have located the connector!!! I have disconnected the two parts and have confirmed the auto retract feature is disabled, the half with the two black wires leads in a sheathing and is taped further back along the wire loom. When I pull on the connector to remove the looped wire from the sheathing I get a lot of resistance? Is it just a question of removing the tape to free the wire or can I push back the sheathing as far as I can and cut the wire then? Does what I just said make sense? I hope so!
The plastic connectors are difficult to pull apart. IIRC, there are 2 locking tabs to be released. After that they pull apart easily. I cut mine and use them as a power source for my relay switched 12V power block.
If you're talking about pulling the looped ends from the connector, why? Just pull the plug and that will disable the auto-retract. If you want to use it as a switchable power lead, snip the loop in half.