The cynical reply would be to cut off the training wheel at the front and stick a little one on at the back![]()
Looks like the bracket is not make to clear the nosewheel brace.
Check with Vans, see if this is the correct unit for the setup you have.
Have a friend who had some ideas about fabricating a new bracket and after several different designs, I came up with something that will work. I'll post a picture after the new bracket is finished.