My son and I just installed the same bar on my VT Acclaim wagon. Believe it or not, the sedan and wagon bars are the same. just remove your bumper bar and reo, fit the towbar to the reo studs, put the reo back on and tighten the nuts. You will find the towbar has plates with mounting holes drilled in them. Drill through the holes into your wheel well (remove wheel first) and place the extra curved plates in the wheel well. It will be obvious where they should go. Now push the mounting bolts (hmm, I do not see mounting bolts in your pix) through the holes you drilled, install nuts and washers and tighten them. I should add here that the bolts needed are high tensile. If you do not want to see your trailer overtaking you, use the correct bolts. Now you can drill the remaining holes in the plates in the wheel well and install the nuts and bolts. Wiring is simple as the trailer wiring is colour coded. Like this:
Wiring colours on VT and VX:
Left indicator = light blue wire
right indicator = dark blue wire
parkers = brown
stop lights = blue/red trace wire
earth = black/blue or black wire
use one of the rear light clusters, you can get your earth, indicator, stop, tail (and reverse lights if fitted to your trailer). Its easy to do yourself, the plug pin number and wire colour is;
1. yellow - left indicator
2. black - aux
3. white - earth
4. green - right indicator
5. blue - aux
6. red - stop
7. brown - tail
If anyone can see any errors, post corrections. This is the way we did mine and it works well.
The 2 auxilliaries are for items like electric brakes, reverse lights and general power for electric appliances etc