Before you sync your promotions to SpareFoot, you're going to need to check the way to promotions are configured in SiteLink.
So, first thing's first - let's navigate to the discount plans interface in SiteLink. You can do this one of two ways.
SiteLink Web Edition is the self storage manager used on a daily basis to manage your inventory and tenants. You can only manage and edit information (like discounts) for one facility at a time. The Corporate Control Center is different from Web Edition - it's a program used to manage multiple sites' data and permissions. Any changes made in the CCC can apply to every facility in your SiteLink account.