Device Details Password - how to set for all/template devices?

Device Details Password - how to set for all/template devices?

Hi all,
 
I have a question regarding the Password option under a servers 'Device Details' section.  When I choose a server I can then click this option, and choose my SNMP under 'Use this Snmp Credential', I have 100+ servers that need this setting, how do I do this on a group basis?  It's not under the deviec template.
 
Bit of an OPManager novice, just getting it all set up so any help would be appreciated.

Thanks

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