Early A headliner install question

Have the wires in place. Had to make some as mine were missing and couldn't find 63 specific ones. Bows line up good. I did pull the front first to pull against the wires. Then I did the center of the rear pulling towards the sides to get it positioned (read that on line and that's what I did with the beetle headliner I did). Just need to start pulling to the sides to get it snug and tucked in. Just don't want to leave too much material.

Are you saying I get it tight with no wrinkles, then pull down the excess (I'm guessing leaving it hooked into the Sharks teeth on the side) and trim, then push it back up into the groove?

Thanks for the help