Kenya Sevens will face off against Chile, Samoa and Spain in playoffs.
Kenya Sevens team must finish in the top four in final leg to qualify for World Rugby Sevens Series playoffs.
Kenya Sevens lost 21-14 to Hong Kong China in the semifinals.
Kabras Sugar star Ambetsa is among three debuts for Shujaa in the Challenger Series. Speedster Janet Okello returns for Lionesses as Kemunto is dropped from the squad.
Wambua won his third title with Shujaa with the Challenger Series in Dubai.
Kenya Sevens knocked out Uruguay 21-5 while Lionesses won 17-0 against Argentina.