Steve, the factory assembly manual shows the routing you describe for your '52 for the 3100 thru 4100 series. The 4400, 6000 series, and the 3742 and 3942 forward control chassis have the other routing you describe on your parts truck. That's what "should" be original, but who knows--your parts truck could be cobbled as you say, or different factories may have done it different ways.
