Neither. The CONNECT box connects SONOS with a classic audio system via 3.5 jack plugs (In and Out). This allows me, for example, to transfer the music from the record player or CD player via the stereo system to the SONOS network. Or vice versa, play the SONOS music on my stereo system with its loudspeakers.
Your question is about the transfer of music stored on the computer into the SONOS world. This is realised digitally without CONNECT via the computer network (LAN or WLAN). By the way: CONNECT can neither feed Bose nor other speakers. CONNECT can only receive or send analogue signals via cable, but it also has a LAN connection.
Everything clear?
Werner Andres