When verifying the installation of pin box couplers on a fifth wheel hitch, the hitch should be positioned in what manner relative to the frame?

When verifying the installation of pin box couplers on a fifth wheel hitch, aligning the hitch so that it is square with the frame is critical for proper operation and safety. This positioning ensures that the weight distribution is balanced and that the hitch can function correctly during towing. Being square with the frame means that the hitch is perfectly perpendicular to the alignment of the towing vehicle, which is necessary to prevent undue stress on the hitch components and to maintain stability while on the road. Proper alignment helps to minimize wear and potential failures in the coupling system, enhancing the overall safety of the towing setup.