Cape Verde booked a date with Nigeria after beating Liberia 6-2 on aggregate in the first round.
Cape Verde defeated Liberia 3-2 in the second leg in Monrovia on Tuesday night.
They won the first leg 3-0 in Praia last week.
The Super Falcons did not feature in the first round after securing a walkover against São Tomé and Principe, who withdrew before the first leg.
Nigeria and Cape Verde will clash in December for a place in WAFCON 2024, which will be hosted by Morocco.