2016 corolla subs

Hey can anyone help me out with how to put subs in I plan on keeping the stock radio but in super lost and could really use the help
Hey man, I have a single 10" in mine with the stock head unit. Just buy the sub and box. a decent amp. an amp wiring kit from Walmart and online purchase the adapter from the link below. Run the positive to the battery. The negative to the bolt behind the carpet on the left hand side of the trunk. The remote wire can be plugged in with the ignition fuse under the steering wheel. Then for the line out converter just connect the wires to the speaker coils in the rear and plug the RCA cables in the line out converter and into the amp. Run the speaker wire from the sub to the amp and youll be bumping!! Hope this makes sense

Kicker KISLOC 2-Channel K-Series Speaker Cable to RCA Adapter with Line Out Converter