In/out play in coupler

On a side note here.....if you take the coupler apart, make sure you install those shoes correctly. They aren't square, they're rectangular. If you install them 90 degrees off, you'll have a lot of play in that coupler. Also, take care when removing the cage off the boot. If you deform the cage, they're really hard to get straight again and clamp properly on the coupler housing.
Ok yeH. So my coupler just shoed up. I finally get the safety pin. Now the shoes are rectangles and...one side is round. So now. Im assuming the round side goes inboard with the flat against the body. And if that is the case, they will only fit one way. With long part of the rectangle going up/down perpendicular to the coupler body. Thoughts?

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