This will seem somewhat silly, but I've been inspecting my brakes pads for wear lately and looking at the wear sensor setup. Poking around some more, for the life of me I could not find the bleeder screw! I was starting to think that Brembo maybe came up with a new design or something. Checked the top, bottom, and backside of the caliper, nothing.

Well it is present. If you trace along the sensor harness on the top backside of the brake caliper there is a rubber boot that supports the harness. "Tada", the bleeder screw is actually covered by this rubber boot. Mystery solved :-)

 

yup easily seen in the images on the Lexus website.