XM + Blitzsae = no need to run power wires?

Guess my message didn't make the jump to the redone forum. Anyways, I'm doing the pioneer XM install and had a quick question. I just ordered the blitzsafe adapter which seems to still be available despite what the DIY says. I got the BMW/XM DMX PIO V1 (they have the V2 also) from
http://www.logjamelectronics.com/xminterface.html if anyone else it looking for it.

Anyways, my question is how does this make it so u don't need to run power and trigger wires? Does it power the unit through the IP BUS out port or is there a power wire which comes off of the blitzsafe adapter. Also the DIY mentions that it takes care of power and trigger but doesn't say anything about the ground wire.

Secondly, what does the CD changer wiring look like? I found a couple of cables bundled together back there one with 3 wires and the other with more (maybe 8?). It kind of looks like the large one would be the interface and the smaller would be a power wire but I'm not sure. thanks for your help.

[Keeferno]

This is from me by the way. Many of you may know me from over on Fanatics.

[MarvelPhx]

If it is the correct adapter, it has a plug on it to connect the power cable of the XM unit. It takes power/trigger/ground from the CD Changer wiring harness...

The other bundled wires you found in there are likely for the NAV system.

You will easily be able to tell which plugs to use...

[Keeferno]

I got my adapter today and it is the right one. It does power and everything. You may want to update your DIY to show that this is still available and maybe give they link to where I got it.

Turn out I also got the right wires. For those who are looking for them it is two groups of wires bundled together. There is a 6 wire one and a three wire one. Mine had some sort of bag or slip over the ends of them. If u want me to snap a pic for your DIY I will do so. Thanks for the help.