Need help.....don't know what this part is called

To make a long story short, a half grown doe walked out in front of me this morning on my way to the lake and she stopped when I drove by, but tried to leap over my boat and landed in the middle of my rear seat, then cartwheeled into my 90 hp Mercury motor. The shroud/ cowling is cracked, but not completely busted and it stays in place and latches down tight. My little round panel that allows access to refill the oil tank is missing. I looked everywhere for it......must have sailed like a frisbee! What is that little round panel called. I've looked on eBay and can't find it because I don't know the precise name. Any advise would be greatly appreciated. Thanks. GTT

I think I found it......it's a cowling cap. GTT