factory amp

Hey guys, I’m advising on my bud’s 2010 lc audio overhaul. He has the base model lc (no tweeter pods in the rear doors base lol) My question is what’s lost when you disconnect factory amp. He bought a man android screen and I assume they have mediocre voltage and tuning capability so plan is...

I tried searching but seems like everything came up for the earlier LC100s. I'm going to install a new head unit soon and would like to bypass the factory amp when I do it. I might just splice everything at the amp but would rather not cut up a bunch of wires. I've found several Metra harnesses...