The snmpcollector should be picking them up automatically and adding them to the profile.
This is the site showing what the snmpcollector probe is supporting.
UIM SNMP Device Support
this one lists what's been added via the Device_Certification_Deployer package
Update Vendor Certifications - CA Unified Infrastructure Management Probes - CA Technologies Documentation
Is CAPM polling the same devices as the snmpcollector?
If not run a sapwalk from the hub running the snmpcollector to verify it is enabled at the device.
when the snmpcollector log level it turned up and a rediscovery done of the device the log will show what it gets a valid response on and what it doesn't.