Angle Degree Indicator Mounting Question

[ken4570tc in WY]

I'm getting ready to mount and zero an ADI on a scope with a 20MOA base under it and I've been unable to find instructions on adjusting the device. Does the ADI get zeroed with the bore at level or line-of-sight at level?

 

[Sniperstud]

Line of sight.

 

[Scott P.]

Agreed! LOS