Why Effective surge protection works by bonding every conductor entering the station to one common ground reference, so that during a surge all leads rise and fall together and no damaging voltage appears across the equipment. That means the AC surge protector belongs on the same single point ground panel where the coax arrestors, rotator and control line protectors are mounted and bonded. If different protectors drain to different grounds, the difference in potential between those grounds is what destroys the gear.
Watch out Putting it at the AC service panel or at a wall outlet protects against surges coming down the power line, but it leaves the AC ground at a different potential than the antenna ground during a strike, and that difference passes through your radio.
One entry point, one ground panel: AC, coax and control lines all get clamped to the same reference.