ground wire

I just bought a 89' Marlin 28 with brand new Zuk 250's with helm master, new garmin electronics, trailer etc. This old girl is in great shape for her age! I am chasing down some old wiring for lights, pumps,etc. I am adding new bilge, wash down and bait pumps. I plan to get my Bennet trim...

I have a 2001 chase 263, and am replacing the perko gas fill due to a leak. When I removed the old one, there was a ground wire attached to the bottom of the inside of the fill. The perko gas fill I got doesn’t have this option, and I’ve read to not ground plastic gas fills. I am wondering if...