I gave a PTO to Sig that had a shaft right through it that had front and rear output flanges, it was a forward reverse pto, are you sure you havent got a forward/reverse selectable pto, they have the twin gears in them like the two bottom ones in the pic, the top one has one gear and is a single directon pto
if you need a single direction pto I've got a couple here that I've only kept as spares, I use the forward/reverse ones
