Apple Mac PowerBook 550c - Manual (Page 161)

Upgrades Modem and DAA Cards - 8
3 Install the modem port
frame on the DAA card.
4 Note: The connector for
the DAA card is on the
underside of the right
end of the card.
Connect the DAA card to
the motherboard.
5 Install the DAA
mounting screw.
Modem Card with
Modem Port Frame