HP Store Once 2700, 4500 and 4700 Maintenance and Service Guide

Figure 5 Cabling example for the HP StoreOnce 4500 Backup system
P1 port on expansion enclosure (Note how
subsequent enclosures may be daisy chained)
2.head server unit1.
Power on button4.P2 port on expansion enclosure (connects to
P1 on adjacent expansion enclosure)
3.
Power connectors5.
HP StoreOnce 4500/4700 (24 and 48 TB) and 4500 (48TB) Expansion Modules 13