Installation types, B) in the countertop in front of the appliance, C) in the countertop next to the appliance – Gaggenau 400 Series 36 Inch Induction Smart Cooktop Knobs Installation Instructions User Manual
Page 4: Observe the following when planning

4
en-us
Installation types
a) On the front of the cabinet underneath the
appliance:
b) In the countertop in front of the appliance:
c) In the countertop next to the appliance:
Observe the following when planning:
▯
Once installed, the control knobs must be accessible
at all times.
▯
Once installed, the control knobs must be visible at all
times. Ensure that the print on the knobs is readable.
▯
The zero (off) position of the control knobs must be at
the top, i.e. facing away from the user.
▯
Do not install the control knobs behind the appliance.
▯
The panel must be at least
^
" (12 mm) thick.
▯
When using a panel over 1" (23 mm) thick, provide a
cutaway on the back for the retaining plate.
▯
Connection cables must not be over 10 ft (3 m) long.