Putting Cardboard Insultor Piece Back On?

[Tempest]

I had to remove the cardboard insulator pieces from my Macintosh Classic while I repaired it.  Now I'm putting it back together, but for the life of me I can't figure out how to put it back on.  The little black tabs I removed don't want to go back through the holes.  How do you get them back on?

 

[dcr]

Very carefully.  You need to squeeze the ends closed so they fit back in.  It helps if you have narrow-tipped tweezers.