The following is how to load it onto the FS7. The process varies per camera.

FS7

Format SD Card in camera
In File menu select All File (to save folder structure onto sd card)
Select Save to SD Card
Select position 01 (there are 1-7)
Save file
Remove sd card and put on computer
You should see this folder structure on the card Private> Sony> Pro> Camera>PXW-FS7
Create a new folder inside Camera Folder
Name folder exactly “PMWF55_F5”
Take your lut and drop it into your new folder. PMWF55_F5
Eject card and load back into camera
Go to File menu
Select Monitor 3D LUT
Select Load SD Card
Menu with 1-4 appears. 4 possible saves in memory of camera. Select 1
Select your lut file to load onto camera
Execute Load File
To verify its in current memory you can select Current Settings in menu and see your lut added to the list.

Apply to Monitors

In Video menu select Monitor LUT
Category should be User 3D lut
Under User 3D LUT Select choose your lut from one of the four possible save spots
Select which sdi, viewfinder, hdmi to send LUT