Hi, to split the coils all you really need are a couple of 500k push pull pots. I don't have a stock humbucker at hand right now to tell you which wires are the split ( I presume they are 4 wire pups) . I'm sure someone will add the info
I have used a Freeway on a build and it was the answer I needed but I was splitting 3 humbuckers plus having bridge,neck and middle .It would be over kill for 2 pickups unless you wanted to do in/out of phase as well as splits. Fiddly things to solder up if you are a novice solder-er like me!