Toyota 2000 Tundra Owner's Manual page 158

Please note if transmitter has wire clip for
sun visor, this clip must be removed prior
to adhesion of the Velcro.
156
Place the transmitter with Velcro square
facing inside of box into the box. Make
sure the transmitter button is
above button pins.
TUNDRA (34413U)
Remove spacers from the center panel.
Place the largest spacer on the pin that
located would be below transmitter button when
the cover is closed. Close the cover.