Wiring Projector Headlights on '96 Mustang

I purchased a set of projector headlights to replace my yellowed OEM units. These light have a number of LED's and a light ring much like newer luxury vehicles. I want the LED's and light ring to be on whenever the engine is running or the ignition is on, not just when the headlights are activated.

Where can I find an ignition switch activated 12v connection point under the hood? I fear just tapping into any old wire that has juice...