Link your bank account. That is where the pre-approvals originate.
I don't like PP having access to my main bank accounts, so I use NetSpend prepaid cards. They give you a debit card attached to a bank account. I am sure that there are others cards that do the same thing, this is just the one that I use. I have all of my accounts set up that way. When I want to transfer money out, I send it to my NetSpend card, then go grab the cash and deposit it into my real accounts. I have been doing that for 6 years. Never had a problem.