rear drums and shoes on a 69

[RonWT]

I changed out the shoes and drums on the back of our 69 CST10 today, I havent worked with drum brakes since High school (40) years ago. I seem to remember my dad telling me to have a place to put the truck in reverse and stab the brakes and do it till they are adjusted, I seem to remember doing that and it worked. The drums do not have any hole for the adjusting tool, nor do the backing plates. is the process I described above correct or is there another way to adjust the new shoes to the drums?

Thank you,

RonWT