Trying to understand these front seat belts.

I do not understand these front seat belts in this 1974 Scamp, they pull out from the re tractors but the shoulder belts just seem like they are not long enough for me to buckle up the lap belt. Even if I pull both re tractors all the way out I would be able to fasten the lap belt but the shoulder belt part of it just is not long enough and stops me from fastening the lap belt.. I have the seat back all the way and still not enough room. This is a bucket seat car with a buddy seat, all the seat belts look the same and have the same design on the lock release button so I don't think any of them were changed out, but you never know. Here are some older pictures of the belts that I am dealing with, if anyone has had a problem like this or even an answer for me please chime in.
Thanks
Bob

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