If your careful you can pry the cap off without unbending the tabs... Then you'll have access to the small pin, I typically use a pair of channellocks, one jaw inside the coupler presses on the end of the pin... The second jaw outside the coupler rests on the edge of the coupler body not over the pin... A light squeeze will push the small roll pin out.. Then the shoes & spring slide out....
When putting it back together I generally reuse the original metal cover with the tabs still bent, carefully pry them back into position & they'll hold fine... Using the new cover getting the tabs to grab causes allot of folks major grief...