I don't have anything like your setup. And your post is a bit too vague.
But here are some things to check and try:
- Bose is a brand, they make lots of things. So, what exact model did you buy?
- What exactly did you name the connection? If you named it 'connection' like your post suggests, what very likely won't work as that would likely be a reserved word. Name it something weird like 'cat' and try if that makes a difference.
- Not sure what exact commands you're trying now. I'm presuming you added a bose soundlink thingie? If so, the syntax would be 'Alexa, ask Bose to ...' (i.e, "Alexa, ask Bose to play preset 1 in the Living room.").
- To get help, say, "Alexa, ask Bose for help."