For your staff to access the GrabFood Connect menu, you will have to give them access to Location Setup. To give access:

Step 1: Visit Setup > Staff.
Step 2: Under Staff Roles, click on the appropriate staff role and click Edit Role.
Step 3: Under Admin, tick the Locations checkbox.
Step 4: Finally, click Save.

Note: Your staff will also gain access to all other widgets under Location Setup.