[WileyTFover]

Late to the party, as usual. I’ll add some info here. The connector Richard posted is an old OBD engine diagnostics plug called ALDL. OBD Diagnostics Inc does produce a ready made cable to adapt between ALDL and the J1708 SIX Pin round.  My experience ordering direct from them was quick, painless, and the cable works great. I coupled it with a six pin BlueFire which works fantastic for me.  My 1996 s60 doesn’t monitor anything beyond what that six pin can pass, but I can’t speak for everyone on that.  The part number for the cable is ALDLto6Madap and a google search should bring it up. I’d post a link but I don’t know how and can’t remember if it’s ok here. 

In my quest to figure out what that connector is called, I found a few references to VmsPc previously offering a direct ALDL cable for their interface. It might be worth a phone call to them if you’re considering their product.  I know wiring diagrams resemble cuneiform to some folks and this will give them some options.  

The analog gauges do remind me of a quote from Geoffrey Rush of Pirates of the Caribbean. “The Code is more like Guidelines than what you’d call actual rules.”