GE JP256WM1WW Owner's Manual And Installation Instructions page 18

INSTALLING THE COOKTOP
5 INSERT COOKTOP INTO CUTOUT
Insert the cooktop centered into the cutout
opening. Make sure the front edge of the
countertop is parallel to the cooktop. Make final
check that all required clearances are met.
18
Installation Instructions
Cooktop
(CONT.)
6 ATTACH HOLD-DOWN BRACKETS
TO CABINET
Open the cabinet door. Install the second screw
through the bracket and tighten. Then tighten the
first screw. Install the thumbscrew until it touches
the bottom of the countertop.
Cooktop
IMPORTANT: Turn the thumbscrew until it touches
the bottom of the countertop. Do not overtighten.
Countertop