Once you run the Generic Network Device wizard against this IP address you'll have a host object created.
At this point you can create additional services and assign them to the host.
This service would be your HP enclosure check.
Let's say you have another check for this enclosure, like a power supply status, you just create an additional service for that check command.
This means you can check multiple things against 1 host.
Additionally it sounds like you may have several enclosures. If this is the case:
- create a hostgroup and put all the enclosures in this host group
In the enclosure service, assign it to the hostgroup instead
This will then perform this one check against all of those hosts