First the SurLock is junk.. I like the Winegard Sensar Pro much better (it doubles as the power injector by the way, or replaces it)
If the antenna is rotatable,, (if not then no signal meter will help) if the antenna is rotatable.. Put it up, scan with your TV, turn about 1/4 turn and scan again. Take notes, pick the quadrant that gives best results, pick a staion and use the TV's signal meter to peak the thing.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times