Bucket seat disassembly.

I'm still waiting on my shop manual to arrive, but I would like to get started doing a few things on my car this weekend. As I understand it 1969 to 1971 GM cars all had the same bucket seats in them, does anyone have the info, on how the molding on the back comes off, so you can get access to the vinal and start switching? Thanks in advance for any info you can throw my way.