Let's get the basics working then sort out the details. First thing to do is make sure a brown line is connected at 61b and a brown line with red stripe is connected at 6. That should reconnect the key and engine to turn off the engine. Next, run a line directly between 138 and 103 bypassing all else. That will give you an uninterrupted boost signal to the ALDA. Shifts might not feel right but we'll get to that.

Sixto
87 300D