Old Boys showed their improvement with a 1-0 victory over Ramsey in the MBL Floodlit Cup on Sunday.
A first half strike from Rachael Warrilier-Grant settled the contest at the Bowl.
The other Group B tie went to form with Castletown, - who have already qualified for the semi-finals – seeing off southern rivals Colby 3-0, courtesy of goals Dawn Winn (two) and Trisha Fleming.
CWG Bowls: Victory for Isle of Man on first day in Glasgow
Mark McGreal wins in the Men's Singles.
LIVE: 2026 Commonwealth Games
Live coverage from Glasgow from 23 July to 2 August
Bowls squad proud to fly the Manx flag in Glasgow
Four local players taking on 2026 Commonwealth Games
Commonwealth swimming team to blend debuts with experience
It'll be the biggest of the Manx squads to compete in Glasgow