Brake Adjustment Hole - 1978 K30 Dual wheel

[68_Step]

I sure hope this is a silly question... The old brake drum had a hole (port?) in the front of the drum so you could adjust the brakes using the star-wheel; the new one does not. There is also not a hole in the backing plate either. Other than the extra set of wheel stud holes and lack of adjustment hole - the new one looks the same. Both have a max diameter of 11.21 they are the same height, and my wheel hub fits in perfectly. I also do not see knockout to punch it out either.