For some strange reason, wifi connectors are not compatible with normal
SMA coax connectors. The center pin is a male in an otherwise female
connector. And visa versa.

Reverse SMA connectors and thin coax are both available cheaply, why go to
the bother of destroying an antenna.

It is also possible to get the female pin from a line SMA socket to fit into
an SMA plug, if you have not a reverse SMA plug.

Jeff