Hi Bangorbob,
My shade tension reinforcements are described at #5 in
THIS POST. I reinforced ours 12 years ago and they continue to do their job well.
BUT.......
Someone later posted a seemingly better solution to consider. If it doesn't work, you can try my round cover plate solution second. It is cleaner looking, less evasive, and is easy to do. I have no first hand experience so I can't officially say it is the way to go, but it is surely worth trying. He used these wall anchors. The depth of the PC wall is not much so I assume you will have to cut off some or all of the drilling tip so the anchor does not hit the outside wall. Predrill the hole in the wall board with a standard drill bit of the same size, then screw in the anchor without it's drilling feature.
I used this type of wall anchor for a different application, but the stress on either of these types of anchors is a bit different when being bumped hard by someone's elbow. Still I might consider trying one of them.
Whatever anchor you try, it needs to work with 1/8" thick wall board, so make sure it states for 1/8" thick walls. If the wall anchor method doesn't turn out so well, then implement my proven "plate" method. The plates will cover over any ugly holes left from previous wall anchor failures.
In the case of your picture of the main entry door, there is no room for my round reinforcement plate. A wall anchor seems to be the appropriate solution.
