Underage South and Sturt sides pre 95 and 98

It wasn't that long ago, but I can't recall where the 19s and 17s for both clubs played before the clubs moved back to Unley/to Noarlunga.
I'd assume Sturt's Underage teams played at Unley and South's played at St.Marys?
I'd assume Sturt's Underage teams played at Unley and South's played at St.Marys?