Lopi Radiant Plus GSB2 Owner's Manual page 20

20
Installation (for qualified installers only)
The vent connector, when hanging from the chimney, may be grasped by reaching above the insert.
Carefully move the connector forward, making sure all 3 tabs insert through the connector.
Secure the vent connector to the insert using the screw removed earlier.
© Travis Industries 4/23/2021 - 1449 Radiant Large GSB2