I am looking for a manual for the Autopulse TwinTranspak 2.5.
Looking at a picture of the back of one, there doesn’t seem to be much instruction needed to connect the thing: http://www.bonanza.com/listings/Train-Controller-Troller-Autopulse-Train-Powerpac-Dual-Cab/6558936.
Are you actually looking for a circuit diagram because of a problem? I don’t know if the manual would have included such.
You might try starting a conversation with forum member rricommish. He posted to the following thread (http://cs.trains.com/mrr/f/88/t/30621.aspx?sort=ASC&pi314=3) and indicated that he had one of those units. You can see his post on the top of page 3 of the link.