Posted on July 10, 2019
Docking was a delicate maneuver, since both ships were traveling at nearly five miles per second, but the docking mechanism itself was one of the simplest on the entire spacecraft, and the docking procedure had been perfected on previous Apollo flights, none of which experienced any significant problems with docking.
S-IVB Venting HydrogenDocking ProbeDocking Hardware
P2-docking-probe
P1-SIVB-venting-hydrogen
P3-Exploded-diagram-of-the-Apollo-docking-hardware-with-the-LM-to-the-left-and-the-CSM-to-the-right