Remove the side firing 10" active woofer and detach the wiring. The two front active 6" and the active 10" are in series/parallel. Lay the speaker on its back and unscrew the active 6", laying them face down on the front baffle. The new configuration is a straight parallel wiring of the two front 6" Discard the jumper wire and connect the neg (black or unmarked) wire from the crossover to the top 6" neg. terminal lug, then make a connection from there to the neg. terminal lug on the bottom woofer. Similarly, connect the pos (red purple, or lettered strand) woofer wire from the crossover to the pos. (red dot) lug on the top woofer, and connect a wire from there to the pos. lug on the bottom woofer.
Locate the 10uF cap supplied with the upgrade kit and wire it in parallel with the midrange caps (large bundle w/red wire attached), and solder in place. You will have to remove the fiberglass damping material inside the cabinet to access the crossover, located on the bottom terminal board. Reinstall this material when finished.
After this is done, install the 10" PR and follow the instructions for the RM30C conversion. You must return the old active 10" to the factory.