Symbol Technologies MC9000-K - Manual (Page 276)

MC9000-K/S for Embedded Windows® CE .NET Product Reference Guide 7-20
Symbol recommends using #8 washers to protect the mounting surface.
Figure 7-11. Sample Mounting Configuration
Do not install the cradle on or near an air bag cover plate or within
an aerobic zone. Also, do not install it in a location that affects
vehicle safety or driving ability.
Power Connection
Read the following instructions completely before beginning.
A properly trained technician must perform the power connection. Improper
connection can damage the vehicle or cradle.