On top of that, in season 2 of "1969", SG-1 manage to dial the gate with military car battery. As Capt. Carter explained, once a minimum power is channeled into the gate, the inner rings are unlocked for manual dialing. Once wormhole is established, any additional power requirements will automatically be compensated be the receiving DHD, as said by the Tok'ra in season 5 "48 hours". Therefore, it is perfectly possible for the Nazis to dial using a single military car battery. Abydos DHD would provide the needed power once connected.