Is that the bolt on top of the filter?
I assume you are talking about the 1/4" pipe plug on the top of the filter housing???
If so it has nothing to do with the filter removal.
It's a great place to add a barbed fitting with 3' of poly tubing, place it in the oil fill hole and start the truck and let it run for a couple minutes. Then with engine running fill your Blackstone sample bottle.