How to stick car in the display case?

What do you do to stick/fix the finished car in the display case/shelf? (The idea is to fix them there so that when I move them, they won't crash into each other or crash into walls of the box)

Drill some holes through the bottom of display case and loop some wire through the holes around the axle of the model.
Worked for me before.

thats work for me too.