ATEN ACS-1208AL - Manual (Page 68)

Optional Rack Mounting
If there is not enough clearance for the unit to slide into the rack when
the rear flanges face outward, the problem can be resolved with the
following procedure:
1. Unscrew the rear mounting brackets from the chassis.
2. Turn the brackets so that the flanges face inward; then screw them
back into the chassis.
Note: Be sure to leave a 13mm gap between the flange and the
rear of the chassis in order to have enough room to screw
the tab to the flange (see step 4).
2003-01-27
KL0116 User Manual
C-2