I have one of these on the way from iBoats:

Which, at first, isn't clear at all how to connect a ski rope to it. I've read of a few different methods, but this is the only picture I could find of one with the rope connected to it:

Is this the correct way to hook the tow rope to this tow ring? This is going to be used for pulling a tube...
Also, should I add a piece of aluminum to the inner transom as a beefier backing plate, in addition to the small backing "washers" that come with the tow ring? Or do you think it will be strong enough without? What would you do if you were installing on your boat?

Which, at first, isn't clear at all how to connect a ski rope to it. I've read of a few different methods, but this is the only picture I could find of one with the rope connected to it:

Is this the correct way to hook the tow rope to this tow ring? This is going to be used for pulling a tube...
Also, should I add a piece of aluminum to the inner transom as a beefier backing plate, in addition to the small backing "washers" that come with the tow ring? Or do you think it will be strong enough without? What would you do if you were installing on your boat?