Install Ops Mgr agents on the servers that will host Veeam VMware Collectors.
Note that if an Ops Mgr Management Server will be used for the Collector role, then no agent need be deployed, as the Management Server already includes the agent functionality.
You can also deploy a fully-managed Ops Mgr agent to the vCenter Server(s). This is optional, as Veeam Collectors use agentless methods to gather data from vCenter. However it is highly recommended, as additional monitoring data will be leveraged from that agent (for example, core services status and application log data concerning vCenter Server).