Rat race hybrid design

Hi all
I am currently designing a rat race hybrid on FR4 substrate see attached

And I am thinking to connect sma connectors on the side of the grd plane to save space,
does anybody have any ideas if the connector will affect the performance of the 180 hybrid

It will produce an impedance bump. Look at the socket manufacturer's application notes to find out what to do to the trace going to the center conductor. This will compensate for the inductance of the center post by making a low pass filter out of it with a cutoff higher than your operating frequency.