Where do i plug the power brake vacuum line into an edelbrock carb?

you don't --it must go directly to the intake, all brake boosters require max. vaccuum and that cannot be acheived by the carb.Where do i plug the power brake vacuum line into an edelbrock carb?
my carb did not come with a port either. i used a spacer plate below the carb that had a threaded port. or you can use any manifold vacume port on the intake.Where do i plug the power brake vacuum line into an edelbrock carb?
The big almost 1/2 inch connection on the bottom in the frt or back.