A firm level base for primary cabinet is very important. Excavate an area roughly 3-6" deeper that the suggested burial height of the unit being installed.
Add approximately 3-6" of compacted materials such as gravel, soil or stone dust into the hole.
Lift cabinet by attaching slings to the (2) 5/8" inserts on the side of the cabinet. The cabinet can be opened, with the wind locks secured while lowering cabinet into the hole to help facilitate cable positioning. Lower the cabinet into place to the recommended burial depth.