VE Ute towbar wiring harness conects to where???

[scrounga]

Hi guys, OK I sourced a genuine Holden VE Ute towbar from the local wreckers which came with a harness but while the bar it's self only took an hour to fit I have spent a lot more time trying to find where the harness plugs in. The harness is about a meter long with a Holden 7 pin flat plug that mounts under the bumper for the trailer and the other end has a square plug with 2 flat yellow plastic pins as well as the electrical pins in it. About 300mm further down from this plug there is another plug that is wrapped in grey sponge with a grey wire running to it. I cannot find anywhere to plug this end into so I went to the local dealer and asked them. I didn't have the harness with me (forgot) but they said it plugs into the main harness behind the tub liner at about the mid point of the rear wheel arch. No spare plugs there so I pulled out both tail lights on other peoples advice and nowhere there to plug into there either. I have seen some on Ebay with the same harness that I have and others with more harnesses and a black box. I figured the extra stuff was for the reversing sensors which I don't have. It's a Feb 2010 Omega. Surely someone must know the answer as it's driving me mental!!!
Any help would be much appriciated.
Thanks Stuart.

[lease1]

Take out rear right panel of tub liner. Mine plugged in behind there

[RiCeY]

Small connector is for reverse sensors. As said remove the drivers side rectangle panel held in by push clips. There should be a grommet in behind the drivers side of the rear bumper where the harness comes into the recess behind the tub liner at the inspection panel.

[TumTum]

Small connector is for reverse sensors. As said remove the drivers side rectangle panel held in by push clips. There should be a grommet in behind the drivers side of the rear bumper where the harness comes into the recess behind the tub liner at the inspection panel.

+1 - same for mine - my towing kit was fitted at the dealership and the harness/box fits 'inline' with the RH side tail light (so you basically unplug the light, plug one end of the new harness into the socket from the front of the ute, other end back into the light and trailer plug comes from the box down thru the bumper).

[scrounga]

Well, everyone (Dealership, forum ect.) kept telling me that it just plugs into the original harness ect but I couldn't find where so I took the car down to the dealership with the tub liner loose so they could take a look. The service guys couldn't find where the plug I had attached either so they sent me around the back to the guys that fit the bars and he laughed and showed me where it would plug into if I had the rest of the harness. AaaaaHhhhh. So back to the wreckers with a picture of what I need and 5 mins later I'm on my way home a happy man.
Thanks to those that tried to help. It was much appriciated.