maybe your interface is different because I couldn't find anything concerning "more funding options" or Source of Funds

However, I did found this somewhere in Profile:

Billing agreements for Preapproved Payments are created when you authorize a merchant to bill your PayPal account. Because this occurs in an automated fashion, we want to ensure that only the funding sources you choose are used. You may de-select any methods that you do not want to use from the list below.

Available Funding Sources:

You have no funding sources available.

PayPal will always use the balance in your account first.

Note: PayPal does not yet accept bank account transfers for Preapproved Payments in your country. We regret any inconvenience this may cause and are working to add this functionality in the future.

guess I'm stuck, cause I already got a primary bankaccount linked to paypal :(