There's no such thing as too much.
Im not following your comment about firewalling the power wire.
Are you talking about just getting the wire from the front to the back. If that's the case just get creative. Hell drill a hole if you have to and grommet it.
Im going to try to write up a "proposal" audio upgrade post it on here and solicit feedback. Sounds like I will need an LC2i, a sub(s), a box, a dedicated sub amp and some kinda green plug adapter to keep from cutting up my harness to get a signal. Unsure where I will get a turn onlead.
Your list is correct.
You will get the remote signal from the LC2i.
For the green sub connector, contact Digi-Key
[email protected]
Send them a couple pictures of the green plug and two them you want the mate. They will find it. You are still going to need pins and a Molex crimper.
If you don’t want to go through the trouble, use a 4 position plug with pigtails. Cut and solder the plug inline with the factory harness. You will maintain the oem plug and allow your aftermarket amp to plug and play. When you want to remove the factory sub, you just unplug “your” plug and plug in your aftermarket amp/LC2i, etc
E Support 4 Pin Way Car Auto Waterproof Electrical Connector Plug Socket Kit with Wire AWG Gauge Marine Pack of 5
https://www.amazon.com/dp/B0144CFM7A/?tag=fordraptorforum-20
Lastly, the factory sub is dual voice coil hence why you need a 4 position plug. Make sure you maintain the proper wire pairs and pay attention so you don’t throw your aftermarket or b&o sub out of phase. You will get very little output and could damage your equipment.