Hi Michael,
Great news! You can purchase Cat5 'tails', that is a Cat5 male to Cat5 female cable about 15 cm long. That will allow you to close up the case and gives you a flying Cat5 lead out of the back of the B2. Then you have the option to disconnect the Cat5 cable outside of the box. This is my preferred method as it does not use up a USB port.
There is also a USB to ethernet adapter capability available for the B2 so that is a feasible option. As long as your B2 software is newer than May 2021, there is a feature to provide this capability. If your software version is 'B2B' then you can run 'Settings' --> 'Web Upgrade' to get to the latest software version, currently 'B2B Oct 22 2021'.
Below is the entry from the Brennan Software webpage for software version on 12th May 2021 and onwards.
- B2B can now install a driver for USB Ethernet adaptors - so you can plug a B2 into Ethernet without opening the box. Settings->Maintenance->Advanced->Get Ethernet will install the driver. Turn the B2 off and plug in the USB Ethernet adaptor and the B2 will use Ethernet and/or Wifi
Regards,
Peter.