Unfortunately the tower is RNG for every map. Power grids split the maps into 3-4 sections. You need to learn which box controls which houses. Of those houses it helps to know which houses can be potential radio spawn locations and which ones can never be.
Even going in cold you're going to have a 25-33% chance of hitting the correct box on the first morph. One out of three doesn't sound too good right? However, there are ways to help increase the odds of hitting the right power box on the first morph.
Cutscenes can help tell you where a tower is (or isn't) for every map except Jarvis and Pack small. Higgins Large, for example, will pretty much cover the right half of the map in the cutscene. So if I don't see the tower in the Higgins cutscene, my first morph is the box at Blair's cove. At Jarvis, all the pro Jasons usually go for the box that controls Elmwood (south central) since there will never be a tower in the cutscene.
The phone house can also help narrow down the search, since the phone house cannot also spawn the tower. The only exception I believe, being Blair's Cove on Higgins large. At Pinehurst for example, if you don't see the tower in the cutscene and the phone is at Turtle Pond, then there's only one house left on that grid that could possibly spawn the tower. So it's best to pick a different grid.
@Tommy86 is currently working on a Tommy box guide that goes into great detail to increase your odds of hitting the correct box on the first try. Power grids are broken down on each map varient, as well as listing odds of each box being the correct one. Also included are video clips containing each cutscene tower for all applicable maps, for reference. It'll be made available on the forums as soon as it's finished. I've been privileged enough to get a sneak peek of the rough draft for most maps, and I must say this guide is very well done.