I glued a couple of pieces of cardboard to the bottom of the backhoe to help hold the ends apart, and then I glued it to the back of the tractor. I didn’t get a picture of this prior to painting it, but hopefully it makes sense.
Here’s another angle of the bottom of the backhoe that is connected to the tractor.
I used card stock to make a base that was used to attach it to the tractor body. The track was 4″ wide, so I cut the card stock to be 3.75″ wide. I glued it to the back of the wheel and then painted it.