8. Now you can wire the cross overs inside the car
crimp all connecters on to wire then connect wires to crossover box as directed neg and pos to woofer, neg and pos from factory plug to where amp hooks up and then the tweeters to where tweeters hook up (it tweeters are too loud when installed, remove pos from crossover box and put it on the -3 space on the far side to lower volume from tweeters)
Next you will need a hole saw that will fit your tweeter size here is the outcome

Here is with the door closed
Lastly hide the crossover box under the dash.
If you have any questions feel free to pm me
The sound is so much better no amp will be needed