You should be able to divert the sub wiring at the factory amp under the passenger foot plate. The subs have (2) two ohm voice coils per, if I remember right. so if you wire each woofer in series then parallel the left and right you would end up with a single two ohm load that would be acceptable to alot of monobloc amps nowadays. Make sure your amp is capable of a two ohm "mono" load. this diagram should help:
https://www.crossfireforum.org/forum/...ead.php?t=9057