Start off by listing your property with a "for sale" status in Base:
Open the relevant listing
Click on the "Diary" item on the right-hand side of the mandate screen
Select the correct date on the calendar and click on "Add"
Set the auction date and time plus the venue - 15 Gallagher Avenue, Halfway House, Midrand
Save the changes
Base will push any for sale listings marked for auction through as auctions to external portals.