Go to Settings > My Settings > Imaging Machine
The Imaging Machine will first need to be added under each location in the admin settings:
Once the Imaging Machine has been added under the admin settings
1. Select the pencil icon for the location which you would like to link the Imaging Machine to
2. Tick the 'Imaging Machine' or use 'Check All' option to select all.
3. Click 'Save'
Once the Imaging Machine is attached to the location, you will be able to add the LSPN to the invoice for that location.