Installation:

Simply drop all files in the Call of Duty Black Ops III folder where the game .exe is located.

Once ingame, press caps lock to toggle the HUD on or off. Press the guide button if you're using an Xbox controller.
In order to make the cybercore abilites wheel usable when the HUD is off, I have bound the HUD to show when holding down on the D-pad.
Same with keyboard, holding 2 will show the HUD. But I recommend changing this to something like the side mouse button for easier access.

Be aware that the menu and button prompts will also disappear when HUD is toggled off.

Changing keybinds:

If you want to change the key/button bindings, simply open d3dx.ini and search for ;Keybinds
Below you will find this section:

;HUD toggle for keyboard

[Key1]      
Key = caps            <--- Change this for keyboard HUD toggle binding
x = 0
type = toggle

;Hold to show cybercore abilities for keyboard/mouse

[Key2]      
Key = 2          <--- Change this for keyboard or mouse cybercore abilities binding
type = hold
delay = 50

;HUD toggle for xbox controller

[Key3]      
Key = XB_GUIDE    <--- Change this for Xbox controller HUD toggle binding
x = 0
type = toggle

;Hold to show cybercore abilities for Xbox pad

[Key4]      
Key = XB_DPAD_DOWN     <--- Change this for Xbox controller cybercore abilities binding
x = 1
type = hold
delay = 120

I recommend changing the keyboard/mouse cybercore abilities to a side button like VK_XBUTTON1

A list of all available Xbox binds can be found here

Reshade compatibility:

Unfortunately I was not able to make Reshade work with this mod.