Thank you for your responses. It has been my target to get my Pantera as original as possible and this forum was a big help during the restoration. After all the way I still have the last few miles to go
Here´s a picture of the side of the carb where the T-piece is installed. It is visible on the bottom.
Thank you Fernando, yes it is 9C786. At least I know now the part number of the T-piece and based on that I will try to find the correct connecting point for the tubing coming from the straight leg of it. Unfortunately 9C786 is missing on the picture with the tubing.
Robert