Radio Shack 120-2182 - Manual (Page 10)

If everything is connected correctly, make sure the connections are
correctly marked or identified. Then follow the instructions in "Mounting
the Components," below.
Mounting The Components
Before you mount the CD changer and its components, be sure it is
connected correctly. Then disconnect the cable from the vehicle battery's
negative (-) terminal.
Mounting the CD Changer
1. Set SPRING ATTACHMENT H/V (horizontal/vertical) on both sides of the
CD changer for the mounting axis you chose.
SPRING ATTACHMENT H/V is preset to H. If you are mounting the CD
changer horizontally, go on to Step 2.
If you are mounting the CD changer vertically, use a screwdriver to
remove the screws on both sides of the CD changer from H and turn
SPRING ATTACHMENT H/V to V on both sides, then replace the screws into
V.
CAUTION: If you do not set SPRING ATTACHMENT H/V on both sides of the
CD changer to the correct mounting axis, the CD changer
might skip during play.
2. Use a medium-sized screwdriver to attach the supplied mounting
brackets to the sides of the CD changer.
3. Using the supplied mounting studs as templates and the width between
the mounting brackets as a guide, mark the positions for the mounting
holes.
4. Attach the mounting studs to the mounting surface using the supplied
screws.
5. Attach the CD changer to the mounting studs using the supplied nuts.
Mounting the Audio Adapter
Use the supplied screws to attach the Audio Adapter under the vehicle's
dashboard.
Use cable ties (not supplied) to secure the Audio Adapter's wires under