I have a 2005 WRX Wagon. I have a Larsen NMO antenna mount for the roof. Should I not worry about pulling down the interior cealing liner and just drill the 3/4" hole and somehow snake the coax through one of the two small plug holes in the cealing?

Or, should I pull down the liner? If so, how?

Or, am I going about this project in the wrong way and is there anyone out there who can point me in the right direction?

Thanks,
Scott