You can try a nice lukewarm soak with about 3 drops of plain honey for 15 minutes, followed by a regular soak to remove the honey residue if he doesn't poop for you soon. It is a natural emollient that will often help them to go. You can do this once a week of so, as needed.
Be sure your daytime temp is up around 80'F to 82'F for proper digestion and that his tank humidity is at 80% for proper hydration.
Your pac looks good.