Old school alignment guys; gauge mount idea. What am I missing?

Magnetic does not work with some wheels. I had some version of torque thrust, and the center hole is too mall to get the gauge in there. The hub does not come clear through the wheel

Dion, can you fashion, wood, anything, some sort of anchor that would fit into the wheel holes from the rear, and allow you to run a bolt/ all thread through to clamp a fixture onto the face of the wheel?