That's a mercury marine rack. I just pulled one out of my boat and am installing a new setup. I have everything but my cable is trash. I have the wheel mount but I'm using my wheel. It just takes any 3 bolt wheel. It's free if you can pick it up or have some one pick it up for you.
I'm in the S. F. Valley 231-750-3429 If you need it shipped $25 plus the UPS charge.