STEP 9: Use ONLY the five mounting screws furnished by Classic Instruments (they are
self-sealing) to install the mounting flange onto the tank. DO NOT tighten the screws yet.
First connect the ground wire with a ring (“eyelet”) terminal around on one of the five
mounting screws. NOTICE! Mount eyelet terminal BETWEEN the metal mounting
flange and the topside of the cork gasket.
They assume you already have a predrilled tank. Do not use anything but screws in kit. If your tank doesn't have a predrilled hole for the sender its up to you to get it done. If the tank is aluminum fab the ring from thicker aluminum to prevent corrosion.