Hi Phill and
to the forum.
This is the latest diagram for the Smart Pie but it is a bit out of date now and is slightly different to the Later MPIII and current MP4/SP4:
The external connections for Pedelec, Reverse, Lights and Horn are still the same but the main harness connector uses a 10 pin connector instead of 8 and for some unknown reason, the other connectors on the harness now have exposed pins instead of recessed sockets.
Alan