If you are happy to use all the Locations in your system then there doesn't seem to be much value in worrying about this. It is designed to work on the Custodian. So for example if you have imported some Locations from an LRC and want to identify these as well as your own when you make selections, then this can be done by setting up their Site Id against 'PrefLocs' in the Setting Table. If you installed Management Studio as recommended for new installs then this can be done with a query. Open Management Studio and connect to the R6 database. Click on New Query in the menu line. Make sure that the database shown at the top left is NBNData (Not Master) - change this with the dropdown if required.
Copy the following into the query editor window and then Edit the line so that AAAAAAAA becomes your Site Id and BBBBBBBB becomes the Site ID of the LRC (leave in the quotes and comma separator) . You can add other site id's if required. Run the query. This should now give you round icons for the Locations with these site id's as the Custodian.
UPDATE SETTING SET DATA = 'AAAAAAAA,BBBBBBBB' WHERE NAME = 'PrefLocs'
If have concerns about doing this or didn't install Management Studio then please provide the Site ID's and I will do a Batch Update for you.
Same approach would apply to imported Names except us use PrefNames in the query instead of PrefLocs.
Mike Weideli