Rossett makes sense but I suspect Wrexham North may be in or near Pandy, maybe on the former Gresford Colliery railyard beyond the north end of the Pandy Business Park. I’m not sure if Rossett would have the passenger draw, whereas Pandy has two business parks and a footbridge ensuring quick access to Garden Village. The whole area also seems to be targeted by various planning apps of late. The only black mark against it is that you don’t want a station on the only part of the line which is single track – you’d reduce capacity of the entire Wrexham-Chester section.
Wrexham South I’m guessing would either be in Rhostyllen or Johnstown. I would put money on Johnstown because of the wider passenger draw. If it is Johnstown, that’ll be a re-opening, as the former Johnstown and Hafod station closed in 1960.
I also suspect both may be used as parkway stations and will likely need a lot of space for car parking.