I am going to invert my subs purely for looks, but just wondering wheres the best way to route my wiring?
Neatly haha - usually around to the back of the subs and then along the back of the box - tape if needed etc keep it tight. Or to a terminal block if you like/if it suits your install. Your subs may be out of phase when you invert them, so on your amp there may be a switch (0-180 degrees phase) flick that switch, if there is no option on your amp then you can switch the polarity of the subs (= & -) to put them back into phase.
Cheers and good luck!
My VY Berlina Build Thread - Mainly Stereo