You should be able to use the empty fuse slot in column 1 (left), 4th position from the bottom, between "AIR BAG" and "(IGN_RUN) ELEC PARTS". It turns on and off with the car's power button.
If you want permanent 12V (for monitoring while parked), use the empty slot on the top of column 2, between the "DOOR LOCK" fuses. You'll need a hardwire kit with a Micro2 fuse adapter.