In order to reduce the chances of my plastic cable sheath collar breaking as shown in the above photos, I pulled the cable sheath out of the guide clips that are built into the steel crossmember just to the right (viewed from the front of the car looking toward the engine) of it. They force the cable into a position that adds stress in a way that looks to me would force the plastic collar to break sooner or later. Unclipping the sheath allows it to straighten out, releasing the sideways tension on the tip ("hat"of the collar). To keep the end in place with that tension removed, and even if the "hat" breaks off anyway, I wrapped two cable ties around the end of the cable and bracket in an "X" pattern.
Never would have known I needed to do that without this thread, so thanks to lowflyin
for starting it and to Slo86GT
for the markup on the photo of the broken collar.