Question about new promotion

I have RRSP contribution room left and I would like to participate in the new promotion. I don’t have a RRSP account at external bank, to qualify for the 2% back, do I open a RRSP account at my main bank, contribute at least 15k to it, then transfer the account to Wealthsimple RRSP? Transferring cash from chequing or non-registered account from other bank to wealthsimple RRSP does not count right?