[TowerTalk] Grounding control cable/Rotator control box

[Noel]

Had a pretty good lightening storm here this evening and decided to
disconnect my coax cables after I heard that familiar ticking sound that
told me there was static charge buildup on the coax.  And although I
have the coax sheilds grounded I still heard the sound and realized it
was coming from my rotator control.  I have a G-450XL rotator but do not
have a ground wire to the control box.  Reading through the manual, I
cant find any reference to a ground connnection. Anyone have any
suggestions how to ground the control box?   

Noel