AEG 949600686 Instruction Book page 16

If the hob is mounted in a 270 X 490
mm cutout, or if for other reasons there
is no room for the side attachments,
these should be removed before the
hob is set into the table.
Set the hob into the table and then
raise it enough to expose the screws in
the sides.
Remove the screws.
Mount the attachment fittings so that
they interlock with the frame (See
illustration).
Reinsert the screws in the sides
through the oblong hole in the fitting.
Set the hob into the table and tighten
the attachment fittings.