Speedometer cable weirdness

I just looked through 110 different cables by ATP Automotive. The Y 804 comes in at 63 inches, and appears to have the correct fittings. But what about this: can I pull out the new inner piece, cut it to size, and then put in into my old cable conduit?? Can that inner portion be cut??
The cable has to be squared. The cable I posted didn't look familiar but I am 200 miles away from home. Let me see if I can find the number on FABO. I'm sure I posted it somewhere.