For those interested in the
n u v i z kit the well written
User Guide may answer some questions. It also has a fairly extensive Troubleshooting section. It's interesting reading. However it too gives absolutely no detail on installing the speakers.
It doesn't auto-download (at least for Mac OS) and I like that. Cmd-Shft-S will download the .pdf if desired. I keep a copy of user guides I might need on my phone in iBooks.
One last thing (for the moment!):
I see that it uses a 3250mAh 18650 Li-Ion battery. This is not your father's AA battery. In fact it's not an AA battery at all. So with a spare you can easily swap out batteries on the go. The only charging though is done in the unit with a user-supplied USB wall charger (1.2A recommended).
I'd probably use the unit a couple of times before deciding if I need a second battery. Adventure/camper types might want one and maybe a cradle to charge a battery outside of the unit.