Winch Cable Splicing (w/o ferrules)

In reading Derek's book, he makes mention that a cable can be
effectively repaired with out using aluminum or copper ferrules, but
apparently by carefully opening up the 7x7 stranded construction and
then interweaving the strands back together for a seamless repair.
Obviously this has advantages of a smooth running cable, but it may be
tricky and time consuming to do right.

So, with that said, does anyone have a document that they could refer me
to that describes this operation in enough detail to be able to give it
a try?

Thanks,

Gary