The retaining pin is Ford part number C7OZ-3C523-A (see attached). I could find no other reference in Ford Car Parts (MPC) including the illustrations, the hoses end just after the steering ram with a notation of "to the pump". It is shown in the 67 Mustang Chassis Assembly Manual (AM0020) as a blurred mess on page 49, view "V" (LH side, center), but with a bit more clarity in the 68 Mustang Chassis Manual (AM0024) page 70, view "V". However, the base part number in the 68 manual is incorrect, 6E523 should be 3E523. The strap is shown as 3C696 but does not appear in the 60-68 or 75 editions of the MPC.
In other words, Ford documentation is lax.
Jim