Your shafts are too far forward. The end of the shaft should be at the point of the shoulder. See that slight bend in the shaft (2nd photo)? That is where your tug loops (shaft holders) should rest. That will put your foot mans loops further back, hopefully within reach of your breeching holdbacks. It does appear that your shafts are too long, but I would rather there be too much space between rump and cart, then have the shafts stick out in front of the horse, as the shaft could get hooked on something or the reins hooked over the shaft. If you could get a few clear photos of the horse and cart taken from the side, it will be easier for us to help you. I also want to see this cute little one’s Face!