The Owner's Manual Library may have what you're looking for. https://www.popupportal.com/resources/categories/owners-manual-library.68/
I have a 1976 Galaxy 8, not sure if that will help. My PUP is still very much in use, so I can't part with the manual, but maybe I can scan/email a section or 2 if needed. Just send me a pm with your email I'll try to get to it next week.