Primary Funding Source – PayPal

Currently when a user goes to back a game using their PayPal account, their “Primary funding source” is set to PayPal Balance and secondary funding source is set to not specified.

If a user doesn’t set a secondary funding source, when we go to collect funds, it obviously won’t go through if they don’t have any money in their PayPal balance.

Is there a way to set the Primary Funding Source to their account’s default Primary Funding Source, or automatically set a secondary, instead of leaving it blank?

Thanks