After doing some searching on here for 350SDL information I can't seem to find much. I just got a restored 350SDL and I'd like to install a new head unit and my Sirius radio. I'd like to wire it directly to the fuse box like I had in my Honda but I don't have a manual or diagram of the fuse box. Is there one even in the cabin or only in the engine bay? It has a aftermarket head unit but no face plate so I just got a new one. I am just looking for some tutorials on remove dash pieces and sills as well. Also suggestions on the best way to run the antenna wire back to the truck. If someone can describe what I need to do I can take some pictures of it along the way for others future reference.

 

So here are some images of what I am dealing with. Basically want to hook up a new head unit, nothing special. Seems they ran speaker wire so I have no frame of reference, even with a wiring diagram, any suggestions?