@blueinkd No worries I think I understand your questions... A distinction: I used component set speakers if not already mentioned. In the case you don't know component speaker sets split up the duties of high and low frequencies between a woofer and seperate tweeter. Due to this they come as a set with crossovers which do the signal splitting.
For wiring I used RCA cables to connect the new head unit and the amp. That is your input. They ran down behind the dash and HVAC controls and continued up under the console right on the carpet (under the cupholder area).
For outputs to speakers, I ran the fronts signal wires forward towards the same cupholder area. I mounted my front speaker crossovers to the transmission tunnel with velcro. The front speaker outputs went from the crossovers up through the dash to their respective sides before splitting off for each tweeter and woofer.
For the rear wiring, I ran the signal wires out and down through a small (dime size maybe) cross cut in the carpet that I made. This was cut with a razor blade and underneath where the console eventually sits so not visible when done. I split each off and ran them behind the front bucket seats directly towards the b pillar. I had a crew cab but this should be the same for any truck/suv model. From there I ran into the door mounting my wires to the factory door harness.
The rear crossovers were mounted with 3m double sided tape to the inside of the rear doors. They did not interfere with window operation but be careful and considerate on placement when you do this. I prewire the crossover before mounting it so that it was easier to run the output wires to the tweeter and woofer.
Hopefully none of that seemed condescending, I am a visual learner so words are not my forte. If you have any other questions feel free to ask.