SEP V.3 antenneas

I have a delema with the antenna mounts for my US SEP V.3 the instructions call for part C23 see first picture


But also in the kit is part C50 pic#2
parts S43 and S50 see pic #3

I used parts S43 and 50 on my US SEP V.2 im just not sure which antennas to use on my SEP V.3