I am looking at a diagram of your rear caliper and need to know which clip you are confused about proper installation. It has 2. One goes in the before the brake pads, clipping on to the caliper, the other smaller one goes on the trailing side of the caliper to absorb the movement of the pads as the brakes are applied. I am attaching a diagram of the rear brake caliper to hopefully assist you in assembly.
The small clip has to be installed so the bridge that joins the left have and right half is outboard of the disc (straddling). It also goes opposite the pin that passes through the pads to hold them on one end in the caliper. The tabs that are on the pads towards the front will actually run inside that clip. To nail it down from there, look for the tabs on the clip that are bent back and those grab on to the caliper to hold the clip in place during caliper installation.
The larger of the two clips installs inside the caliper before the pads are put in. Again, look for the tabs that are bent up and those will grab the caliper to hold it in place during pad removal/installation. Also, look for matching up wear marks that should be present on a caliper that has 17000 miles on it to confirm you have the correct orientation front to rear on the large clip. The curvature of the large clip indicates that it is installed so the curvature agrees with the circular line of the rotor. Think of 2 circles, with one inside the other, parallel or concentric so to speak. If you look at the large clip from the top down, you should see how one side looks like a giant letter I. That "I" side is installed inward, or towards the wheel. The outer edge looks more like a straight line.
If you have any more questions, feel free to ask.