That brake rod adjuster is between the booster and the master cylinder. That may be something the manufacturers eliminated as a cost cutting feature on the newer vehicles, I don't have anything newer then a 04 and I have not taken the master cylinder off the booster on that ride.

You may want to keep an eye on the drilled hole to be sure it doesn't start spitting out brake fluid into the engine compartment. The last I heard, brake fluid is still effective at removing paint from everything.