Finding switched 12 volt source

I guess now I’m at the point I need to decide where to grab the 12 volts from, doing the least amount of damage to the OE wiring.

I’m thinking I may just pull the power off the fuse panel. Not sure if that is the best thing to do, or even a good thing...but that’s where I’m thinking I may get it at this point.

Any objections to this? If I’m thinking correctly, if I pull the power from the fuse block, I can leave the wiring at the ballast resister plugged in and just unplug the OE ignition box.

Of course, I could be nuttier than a jar of goobers too.