Look for a rubber grommet that other wires are passing through and piggy back it there. Look from the engine bay and from under the dash.
A better way to power low draw accessories like LEDs is to tap into your fuse box. Look at the interior fuse box and find the fuse slot for your windshield wipers (or an empty slot). Use a multimeter and check if that slot is powered when the ignition is on the II setting or if the car is on. This way you won't kill your battery if you accidentally leave your LED lights on.
Then use something like this to power your lights.
