ADS Environmental Services FlowShark QR 775003 A2 - Manual (Page 179)

Monitor Installation 7-3
Bolting the mounting bracket to the flange welded to the monitor
6. Carefully lower the monitor into the manhole, and place the
keyhole of the mounting bracket over the anchor bolt.
Note: ADS strongly recommends attaching a security line
to the monitor before lowering it into the manhole to
prevent the monitor from accidentally dropping down into
the manhole during installation.
7. Tighten and secure the bolt against the mounting bracket.
Monitor installed in the manhole