jeep liberty 2007, accessory wiring

Hello all, After having searched a lot on Internet and on the forum I have still some doubts about how to solve my installation wish. I would like to connect an external GPS (garmin) and a thermometer in car. I would like to leave them constantly plugged , and the solution to have then plugged into the cigarette lighter socket is not suitable because they are constantly switched on. I would like that they start to work once I start to use the car The best solution is to plug then to the accessory wire (I guess) From the (very rich) 12volt Database I found out that for my model the correct wire is the pink / YELLOW. Where I can find it (normally should came from the fuse block) ? I do not need a specific relay as the consumption will very low. (?) For the ground , is enough to pick it anywhere ? Thank you very much in advance. Sunazur

Ignition loom or radio feed or fusebox. Cig lighter ground or any retaining bolt, preferably in the kick panel area.

Thank you very much...