Tidying Up
Now you should be left with everything outside looking great, working sensors, and a tangled mess of wires in your boot.
Enter copious cable ties!
Stuff it all behind the panel you've been routing cables to, use the sticky pad to secure the box, and get ready to hide it all completely:
Et voila!
Hopefully this guide was helpful to someone - if anyone has any questions, comment below or PM me
Note: I wrote this at about midnight whilst also watching TV... please excuse any spelling errors!