[Fly-Sig]

Lol, had a spare part after taking off the tank and airbox. A flexible rubber cover. Finally found it on a parts diagram - it covers an electronic module in front of the battery.

 

[dddd]

I won't believe it is to keep rain away with that hole right over the connectors...
It might be a heat shield to limit rising hot air flow to the tank.

I can figure a 2nd use, when disconnecting the fuel line; you still have to put a rag to capture a couple cc of fuel but at least it's not dripping in unwanted places.