Bernina Happy Voyager Resource Manual page 59

Happy Voyager
Installing the Hoop Tech Device/Machine Set Up 23
Some window kit contains two upper windows and a
lower window.
Upper window Lower window
Two styles of upper window inserts, one of these will
be of shiny metal construction for lightweight fabrics,
the other yellow upper window is for bulkier projects.
For Lightweight fabrics
For bulkier projects
Install the lower window into the clamping system by
first loosening the thumb screw in the center of the
clamping system and slide-in the lower window un-
der the two hooks in the base until it stops.
Hold window in place and tighten the black thumb
screw to secure the lower window.