More than 10,000 tickets have been sold for the play-off, with sales on schedule to beat the previous record.
Gemma Grainger’s side have broken their previous attendance records twice already in their World Cup qualifying campaign.
The attendance for the Slovenia match more than doubled Wales’ previous best of 5,445.
Wales’ first home game of the campaign was watched by just 1,700 supporters.
Grainger has named record-cap holder Jess Fishlock in the play-off squad, despite her missing the last two group games with injury.
However, another of Wales’ key players, Natasha Harding, has been left out for personal reasons and is replaced in the squad by Bristol City’s Chloe Bull.