You used two fuses? The CSS is just one switch (one fuse is all that's required). IIRC, on the CSS, there are two wires going into one terminal and one wire going into the other.
Too large of a fuse size should not matter - you're just using fuses because they fit nicely (there's nothing about that portion of the circuit that needs any actual additional protection).
FWIW, one common issue is that the switch gets out of adjustment and the clutch needs to be pushed really hard [to close the switch]. If you had the switch out and tested it, this was probably moot, but for in-car testing, it might be an issue (since it's a pain to get under there to test anything). The switch has some adjustment.
Good luck.