1000w fli sub has 5 wires on high level input. What do these wires connect to?

Also called speaker level inputs, an input on an amplifier specifically designed for higher voltage and lower impedance signals, typically between 1.2 to 12 volts and 4 to 8 ohms, as found on the outputs of low powered speaker connections. Hi-level inputs are commonly used as an easy and convenient upgrade path to connect factory-installed head units to after-market amplifiers.
high level inputs are less subjected to interference and can travel further without signal loss.
Factory radios do not have dedicated outputs for amplifiers (preamp outputs). So you'll want an amplifier with speaker-level (often called high-level) inputs; these inputs enable you to tap into the factory speaker wires for a signal flow.
They're called high-level inputs because the voltage level is significantly higher than with a standard preamp output connection. These inputs convert the high voltage to one the amplifier can handle. Once connected, you'll hear clean, well-defined sound (including the lyrics to your favorite song).
Speaker-level inputs are a standard of many two- and four-channel, and mono subwoofer amplifiers.
All the power wires no the amp will be ran the same with the exception of the remote turn on wire. +12v constant will still go to the battery(properly fused with 12" of the battery!), and the ground will still go to the chassis. You can hook the remote turn on to the +12v ignition wire behind the radio, or the equivilent fuse in the fuse box. I would not recomend hooking it up to the pwr ant wire on the stock deck as it often goes off when the radio is off, or cd is playing.

As I said, most cars have no issues with any of this, but cars with "PREMIUM SOUND" systems often do not mesh well with aftermarket equipment. Fords JBL or chrystlers infinity (And bose in darn near anything!) are often cause issues. Sometimes you can easily bypass this system(Ford), sometimes you have little choice but to rip it all out and start fresh(Bose). I can walk you through the scenarios for most makes and models, but certainly do not have the time or patience to give every one. Hit me up on the forum and I will be happy to help you further....

Its a plug fuckin idiot