I will say this, if you add it (or have it) make very sure you have closed the flange toward the body and put a stick or bolt through the eyelets BEFORE you bleed the system, or you'll blow it out/compromise it.
Sorry for the delay, really busy...but I found the picture! Could've been better, that parking brake cable is in the way... and it's too dark and cold to go out there and get another Basically, depress the eyelet you can see towards the one hiding behind the parking cable. Stick a pin/bolt/whatever to lock it open and bleed the brakes. Then remove the pin or whatever you use to lock it open and you're good to go. It was an old time VW mech that found this problem. My Jetta was braking ok, but under avoidance braking she'd develop a lateral "warble" even after other adjustments. This mech changed it out..."too many people don't know about this..." and now she hauls down straight and narrow until ya can hear the rivets.Cheers,Andy
I put a new valve on mine this week. The two eyelets you are referring to can't line up on mine (didn't on the original one either). When you are bleeding them this way, what method are you using? I have a Mityvac hand pump, and usually bleed all my brakes using that, but I couldn't get flow at the rear brakes at all, no matter where the reducing valve lever was positioned. I had to bleed it manually with my wife pressing on the brake pedal and myself cracking the bleeders. The vacuum works fine on the front brakes, so I'm assuming it has something to do with the reducing valve.(Everything is new from the master cylinder back.)