Install the crossover near the woofer, run new wires up to the tweeters.
To wire the woofer either run new wires from the crossover or cut of the connector of original wiring to the woofer which goes to the crossover in and use that connector for crossover woofer out.
Really up to you how you want to do it.
2010 JKU Sahara
It's all about smiles per gallon, not miles per gallon