So I've researched this topic a lot online, but haven't found what I'm looking for. Before I tell you this, I'll give you guys an idea of what I'm trying to accomplish. Please understand that I'm an extreme beginner to Arduino, and that I've only been at this for a month or so, but plan on doing so much more.

My friend and I are building an RC car. We have an Android phone that has a downloadable application which connects to the Bluetooth HC-06 module that is on the Arduino UNO. We have configured our circuit, and it works fine! I want to go a step above and beyond, though. 

My goal is to build a physical, handheld controller or remote (literally plopping everything on a breadboard), and connect that controller or remote to our car using Bluetooth. We have an HC-05 and HC-06 module, and the HC-06 is on the car. Now comes the doubt.

I understand how the android application sends characters through to the RC Car via Bluetooth; that's pretty straightforward as the two pieces are paired (using Android's Bluetooth Settings). What I don't understand is how to pair the two HC-05 and HC-06 Bluetooth modules. There isn't too much help online, I feel. I've looked and people have shown that they connect, but they don't explain the theory, so to speak. 
    
 **What I want to understand is: 1.) How the two HC-05 and HC-06 modules pair, and 2.) How can I read input from one (remote controller) and execute an action on the other (RC car). From the app-to-Arduino, I was using Serial.available() to see if the Serial had any characters sent over from the application. I can't see how I can do that with HC-05 to HC-06 pairing, however. This concept is hard for me to grasp.** Any help is greatly appreciated. Thank you!