HP 354556-002 - Manual (Page 22)

22 HP BladeSystem p-Class Enclosure Installation Guide
Item Description Configuration
1 Power supply bay 1 Bus A
2 Power supply bay 2 Bus A
3 Power supply bay 3 Bus A
4 Power supply bay 4 Bus B
5 Power supply bay 5 Bus B
6 Power supply bay 6 Bus B
Installing an HP BladeSystem 1U Power Supply
If necessary, remove the power supply blank.
NOTE: Order the appropriate AC power cord if you are not using the
PDU solution to provide power to the equipment.