Howdy, I was able to source me a complete dual valve setup for my '66 1020 tractor at a bargain of a price. got everything from the double SCVs to the lines and the qd's. My question is about the type of quick disconnects that I am getting. I am used to seeing the quick disconnects that have the locking levers on them like the ones on our 4020, see the pictures below. But the setup I am getting does not have the levers, just a bracket that holds two female couplers. What's the difference between the two quick disconnect couplers? Is one better than the other? Looking through the parts catalogue, both were options on the 1020. I just no idea what the difference is. Thanks