Almost.
You have drawn a grounding connection on the third tone pot terminal. That ground wire should solder to the chassis of a control pot. The third terminal on the tone pot should remain unused. (The rolled of signal passes to ground via the capacitor.)
In an ideal electronic world, rotating the volume pot to maximum SHOULD place the grounding terminal out of circuit. Hence, your pickup would no longer be grounded. It might get quiet.
Ground the pickup to the lug in the screening paint.