Fitting fluorocarbon strings is much the same as fitting nylon but as I use solid headstocks, the process is somewhat easier.

t1 My bridge design uses a curved hole for tying the string, so giving it a little kink before it goes in makes it easier.
t2 I always put the end over a flame to make a little ball. This stops the string from scratching the top and will stop it from popping out if the knot should slip. This should be done with all classical guitars for the same reasons.
t3 I use a normal classical knot. There is another knot method that just goes through once but you shouldn't use it with FC as it is not as stiff as nylon. (even though it is much stronger)
You only need an inch and a half of string to finish off. The strings usually come as a continuous length so this saves wastage.
t5 Make a simple knot on the inside of the roller. don't leave any slack on the string as it will stretch going on.
t6 A close up of the knot. It doesn't matter if it goes over-under or under-over.
t7 Pull the knot tight and hold it in this position while you wind it and create a little tension.
t8 Now the tension should hold the knot in place and you can continue winding, but hold the string down with your thumb so that the string winds downwards and doesn't roll over itself.