Roland PG1000 programmer - connections to use with D-50

Connecting the Roland D-50 with its PG1000 programmer can be a bit confusing.

These are my notes of how I'm using it with my DAW (Abelton)

The midi merge box I'm using is a simple   ... 3 in / 1 out box

It mixes MIDI from the DAW and PG100 & sends this info to the D-50.

There is one final connection from the D50 back to the programmer.

Here is a pick of the rear of the programmer:

The PG 1000 is a brilliant machine

For the record, here is the rear of the D50