Thanks Shadetree. That makes sense to me, although I didn't know what that access hole was even for until now? I suspect it's not lined up where it's supposed to be so that I can get to that screw as I have had the drums off previously and never knew I had to put them back on in a certain way so the hole lined up with the screw. I am certain there is no rust. I actually did get the one side off and it looks almost new inside believe it or not. Never in water or mud etc.
Thanks again.
as wheels pointed out ^^^^, makes no difference how or where you install the break drum ?, all you need to do is pull the rubber plug ( if its still there ? ), spin the drum or wheel, line the hole up with the adjusters. if you look in with a flash light, you will notice on the wheel cylinders, right there where the star wheel adjuster is, there is a arrow pointing one way ?, this is to expand the break shoes when you have the drum on. turning them the other way will back the adjuster down to bring the shoes inward, now you can remove the break drum, that's if...the wheel bearings are seized ?, other than that..its pretty simple. as I said..most times...those adjusters rust over..and can be a royal pain to get unstuck..spec if they have never been serviced ??!!.