XM in 2004 Civic EX
 

As the technically inclined (sort of) friend of an Emo-poet type, I am often asked for help when the use of tools is required. I have once again been called upon to be the problem solver...he wants to install the XM Radio unit that was in his truck in his wife's 2004 Civic EX. From his desription, I believe it has the single CD player head unit (Honda #08A53-S5D-100), but I cannot locate any diagrams of the rear of this unit on the web.

Did Honda provide for connections or input of auxillary devices on this model? Is there an aftermarket harness available? Pin diagrams? Anything would help. This is a busy month and I don't have much spare time to put into this apparently life or death project, but hey, what are friends for?

Thanks in advance.