The black and yellow wires coming out of the black box are the positive and ground wires to power the interface unit and supply power to an iPod through the docking cable (which I don't see in your pics). if you want to hook it up just to play whatever is on the Sansa, then you just need to use the ...

Thanks for the detailed and completely awesome post. Just did the drain and fill on my 2002 V70 XC that I recently purchased with...173K, body great shape, interior in amazing cond., engine/exhaust/suspension all obviously well taken care of and in great shape (have had a few other Volvos, see a goo...