76 series wagon with towbar

Hi Guys

I am designing (have designed) a replacement tank for the wagon, but want to make sure it fits with a towbar.

I have assumed it will be a similar design to the troopy towbars getting around.

The local toyota dealers don't have any vehicles/towbars in stock to look at.

Would anyone with one of these vehicles be kind enough to post a couple of pics of the towbar mounting and the back of the hitch receiver.

Ric