Could be a case of a "tired" spring on the SIMM socket. And SIMM sockets solder pins are always the same (standard). Just pick the ones you think best fits your needs (vertical, oblique or horizontal), just use those with metal clips (plastic clips are crap).
Using a plier or a sharp small-screwdriver, try to pull a little the contacts.
BTW: all Amiga accelerators uses 5V SIMM.
