these are very very hard to fit as they are made to go with coaxial cable
and if you can get it to mate with normal cable with any success your doing better than we can do!
the positive solder pin is very small as it is made to fit a specific cable type and it is well protected so very fine soldering is require...not a problem in it's self but getting the cable core to go through the hold that leads to the centre pin will be!
good luck.
kind regards john routley