I wired a bluetooth receiver straight onto the tape inputs on the PCB, it has inputs for next/previous track which I had to cut traces on the front panel inputs to get working. The receiver has separate audio and data grounds so no buzzing/noise

So I've got a 2000 S70 T5 that I want to swap to manual but its much easier to find a later M56 box than a P80 one.
Does anybody know if the later 23 spline box with the clutch from the 2.5 T5 mate up to my 2.3 using the 2.3 DMF(solid flywheels also like hens teeth around here).