Good news Update. Talked with my brother.
Make sure that the ends are not frayed from the cut.
If they are square (flat ended) proceed
If they are ragged cut them as close to square as possible.
There is a splice connector available at Amazon: search for "45mmFiber optic fusion splice protective sleeve " (50 pack) manufactured by weno networks. The cost is 10.60 plus s/h.
place each end into the sleeve and heat it according to mfg instructions. Its a polyolefin material (heat shrink tubing).
As long as the ends are cut close to square and abutted together, there should be little loss in the transmitted light.
Hope it works out for you.