Fuel Pump question
I can't seem to find the purpose or what this rubber cap is protecting. Long story short I got a new tank for my bike when I took the fuel pump out of the original tank this rubber cap (circled) was actually laying in the tank. The tab that attaches to the rail or whatever you want to call it became brittle/broke so the cap was not secured to the pump anymore. From google searches it looks like most of the time this cap off anyway, just wondering if it matters if its there or not. Thanks!
PS the photo attached isn't my pump, mine doesn't have that cap at the moment.