I just bought a series 2 505 diesel and have a question about the vac pump. It is the larger version pump and has an outlet on the top side that is marked "outlet" but mine has nothing hooked up to it. It works just fine as the inlet goes to the air filter and the other outlet port goes to the brakes and climate control. SO where is the "outlet" meant to go? If anyone has one of these cars, could you go and check and get back to me? Thanks!