Hello, I’m trying to connect a new wood burning stove to an existing chimney. The chimney is already existing and is a 8 inch pipe (see attached photos). I have some questions about the connection to the existing 8 inch chimney. After remove the existing fireplace what was left was the 8in chimney pipe with a copper crimped piece that the old pipe connected to (see attached photos). My question is: How would i connect to new 6in pipe to the existing 8inch chimney? I’ve bought a 6 inch to 8 inch adapter but I’m unsure how it will fit with the existing copper piece on the end of the existing pipe. Do i remove the copper piece and existing 8 in pipe and replace it or can i just remove go directly into the 8in pipe? Thanks and any help is appreciated.