Smeg PM3621WLD Translation Of The Original Instructions page 37

Spring clips
To ensure the hob is fixed and centred as
accurately as possible, the clips provided
must be positioned as described below:
1. Fit the clips by gently pressing them
horizontally into the appropriate space.
2. Then turn them upwards to fix them in
place.
Installation
Position of slot for clips
(seen from below)
65 cm
75 cm
90 cm
89