I have an older style Sony CDX-MP70 head unit in my vehicle and it is "XM ready". I was hoping I could get the newer tuners to use to connect it. The sv300 I believe it is has an 8pin mini din male output but the head unit has a 6-pin mini din female port. Is there anyway to connect these at all or make the newer tuner work? If anyone knows the pinouts i may be able to do something.