SIP Question (Setting up EnvisionWare Lockers)

We just had SMART Lockers from EnvisionWare installed, liking them so far. We are working out our workflow and processes and I have a nagging feeling about SIP Location Code and SIP Organization ID. Instead of using our default which points to the port we allowed in the firewall, should I use the number for the branch created for the lockers AND how do I locate these corresponding numbers?

Sorry if I sound clueless, long week, brain fried, ready for the weekend.

select * from polaris.polaris.SIPServicePorts (nolock)