Debbie: Yes, that is it. Red goes to brake lights on the car. Test with a test light to see if power is going into your old converter box. If there is power there when you step on the brakes with the ignition key on the box is bad. White goes to ground, green goes to right turn, yellow goes to left turn and brown goes to tail lights. It should be a cut out the old converter five wire side and splice the new converter up by matching the same color wires to matching existing wires on the Rav4. Simple. I hope this helps. The new converter sholud come with a piece of two sided tape. Just mount it to the rear panel inside the rear of the Rav4 so it stays put. This will keep it from getting banged around going down the road. This will keep it from going out on you.
The new four wire pigtail on the new box goes to the trailer plug on your trailer. Are you done yet Randy???

Make sure you test the wires coming out of the box after you install the new box or you can hook it to you trailer to be sure it is operating correctly. Step on the brake pedal and see if it works. With key on & the brake pedal pushed down, try both right and left turn signals. Any U-Haul dealer will have this new box, so you don't have to come to Reno to get the new converter box.