Apple 13 INCH LATE 2006, 13 INCH MID 2007 - page 294

MacBook (13-inch) Additional Procedures— Darfon Keycaps — 294
7. Allow the scissor mechanism to fold at and hold the slider bar in place while using a black
stick to insert the scissor pins—one at a time—into the top case ears.
8. With the scissor pins inserted, use a black stick to raise and lower the scissor mechanism to
make sure it moves freely.