The connecters have arrived!!
They cost approximately 18.00 shipped and about a week and two days to get to me so now what I will do is remove the original connecters from the main PCB once again and install these.
The problem should be resolved and these connecters will ensure a stable connection between mother and daughter board lying flat.
Any daughter board corrosion or not will/should make a solid connection between the two.
I will return after they're replaced.
BB