Missing Rivet(?) in Selkirk Telescoping Double Wall Pipe

[PolrBear]

Working on installing a Selkirk double wall connector pipe. After putting in 3 stainless steel screws at the top (connecting pipe to support box), I noticed a hole in the pipe that has missing paint and I'm guessing might have started out with a rivet in it. What should I do here? This will be covered by the decorative ring that comes with the pipe, but having a hole doesn't seem like a great idea. Maybe just screw an appropriately sized sheet metal screw into the hole?

 

[begreen]

It's on the outer wall, so not a cause of concern. A pop rivet would work.

 

[PolrBear]

The hole goes all the way through the pipe, i.e. you can stick a toothpick through it and drop it down into the stove.