On the advice of my chimney guy, I got a Selkirk telescoping double-wall stovepipe (this one: https://www.ebay.com/itm/313773554737) to go between my Hampton H300 stove and the ceiling support box. The distance is less than 60", so the pipe is plenty long. My confusion is that neither end fits the stove, and I'm not even sure which way the pipe is right-side-up. I know very little about all this, so please tell me like I'm five: What adapters do I need and how do I put this together? Or, have I got the wrong pipe entirely? Pics attached of the support box and the top of the stove, showing one end of the connector pipe (probably the wrong one haha).