3 Way crossover components build

There is no such thing as "regular speaker wire"! Depends on the power/current and length of cable run what is appropriate. For short interconnects the current handling is the limiting factor - so what is the max rms current? Then find a chart of wire size / current.
 
I already have 10 wag pro speaker wire 50' 4 conductor since bi-amp 4 way. the 3 way top is full range passive crossover Im building. I mean it will be speaker wire for crossover to drivers in the cab max 2 foot run. The 12" Eminence neo is rated at 450 watts rms. Thanks😉
 
Just another question: the caps and coils how do I attach them on the ply board, drill holes for plastic ties and 5 minute epoxy so as to not move when the cabinet is lug around? The bigger iron bar coil are they attached using plastic ties + epoxy glue on the bottom side of the coil? Thanks