Compaq R6000 - Manual (Page 37)

2-12 Compaq R6000 Series UPS Operation and Reference Guide
Install and connect the battery packs
1. Verify battery circuit breaker is off.
WARNING: To reduce the risk of personal injury from electric shock or damage
to the equipment, verify that the battery circuit breaker is in the OFF position
before connecting the battery packs.
Figure 2-7. Verifying battery circuit breaker is in the OFF position
IMPORTANT: Leave the battery circuit breaker in the OFF position.
2. Slide battery packs into the UPS chassis, left battery pack first.
Figure 2-8. Sliding battery packs into chassis