Need help with fuel gauge not working?

Fault in the panel is a given in my opinion. Broken contact pin at circuit boards harness connector ? I'll lay my quarter bet there.

Will I have to pull the cluster the check this? This morning I've verified the ground strap in engine compartment and the jumper ground clip at the tank. I pulled and cleaned the L shaped contact on the sending unit and the ground strap. Gauge still not reading.

Thanks Gary