I'm putting them in the middle so I cut the vertical supports. The integrity of the grill doesn't weaken that much.
Remove the headlights. You can get to the top of the grills from there. This is how you will reach the DRL wires.
If needed, cut the excess trim of the DRL using a dremmel.
Put the DRLs in the grill. Do not secure right now. Route the DRL cables so that when you put the headlights in you won't catch the cable. Feed the DRL cable into the trunk space through this opening
Next wire up the relay
Add a grounding cable to this post
Once you have this, you'll have all the wires in the same place. Create a mini loom and cut all the cables to the same length. Then solder the relay to the DRL/Ground/Feed loom wires
Pin 30 is from the custom feed loom (Fog +ve)
Pin 86 is from the custom feed loom (Mainbeam +ve)
Pin 85 is the DRL Ground (DRL Blue Wire) and Ground Post.
Pin 87a is the DRL +ve (DRL Brown Wiire)
Tape it all up and place the relay in the cavity like this. You can cable tie it to keep it secure.
You should now be able to test
Once you are happy that everything is working go ahead a run this test.
Car ignition on -> DRL On
Side Lights -> DRL On
Main Beam -> DRL Off
High Beam -> DRL Off
Fog -> DRL Off/High Beam Off
If everything looks good you are done. Secure the DRLs. Put all the trim back (inside and outside the car)
Finished picture.
I'll try and get a video up to demo the behavior.
btw, particalwave ... nice color ;-)