the Neutricon connector is not made like this any more, the newer ones have the classic pin-whole construction
this original Neutricon is genius in that it contains the same contacts on male and female connector and that they clean each other, so we had very little failures in the 30 years we are using them. except that:
its possible to insert a 1/4 connector and it can bend the contacts – but you can bend them back, carefully!
if one of the male contacts stands out, it can bend all the female contacts it meets (but not reverse 🙂