Toptekits 90-Degree Angle C13 to C14 with Mounting Holes Power Cord, IEC320 C14 with Screw Hole to Left Angle C13 Computer Power Cable, Elbow Plug C13 C14 Cable,2ft/60cm

You get a short C13 to C14 cable and make a custom mount in the back for the inlet. Not recommending this one but an example: https://www.amazon.com/Toptekits-90-Degree-Angled-mounting-Extension/dp/B0B24ZD8TM