To Configure My Location:
Access the My Location window (via Applications > POS Back Office > My Location).
Select a Store from the drop-down list of store names. \

Select a Register from the drop-down list of register names.
Note
If no register has a machine name, "Please select" is displayed in the Register field. Select a register from the drop-down list.
Click OK.
You can now perform POS transactions, and the store abbreviation and register number will display in the status bar.
Configuring My Location (Store): Troubleshooting
If you see this:

click Cancel and see Configuring User Authorization for a Store
If you see this:

click Cancel and see Adding a Register,
then, if necessary, see Configuring Register Devicess