did you have a soft or hard top before? the channel should be a big plastic piece with the hinges on it, right? well the fabric goes into the one side of the folded over, so the top of the top is facing down, and you put the screws into it into the channel. basically is how its done. There are prob some vids on youtube... ill look.
hopefully that helps some. The thing is alot of them are slightly different and install different. but its the same basic idea.