If, for any reason, that harness needed to be removed, the Ty-Rap would be cut and odds are - not replaced. I'm thinking of possible reasons: fended removal; lower valence removal; bumper removal; light bulb replacement (What the heck is that thing doing there?). It's been 50 years.
I'm quite sure that everybody has a couple of spare Ty-Raps in their tool box. I sure do. /sarc
Jim