As long as the Zeus and the computer are on the same network and you don't mind having the Zeus running you don't need serial
or USB ports
to access the NMEA
data as the Zeus provides this via TCP/IP.
Check out the "GoFree" section in your Zeus manual. It will explain how you can determine the IP address of the Zeus, and which port you can use to read NMEA0183 data.
If your computer is on the same (wired) network as the radar the Navico
plugin can be used for use with the BR24/3G/4G radar. With WiFi YMMV -- it heavily depends on the bit rate chosen by the WiFi access point for multicast data.