70 cuda rear seat belt identification

Trying to find out if these are the right rear belts for my 70 cuda. Can anyone identify them.

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The ones you are showing are 72 belts, all models.

Part #: 9917 HX9 (Black)
Label No. 3670 178
BELT, Front Seat Lap Center Tip Half
3471 = Week 34 1971

Part #: 9918 HX9 (Black)
Label No. 3670 789
BELT, Front Seat Lap Center Buckle Half
5171 = Week 51 1971

Here are the labels from my 70 Cuda seat and shoulder belts. Black buckle & black webbing.

Interesting, all my belts front, rear and shoulder have XX71 for the date. Somebody must have changed them at one time. Thanks