How to Connect two Arduino UNO'S using Two RS485 boards??? Please Help?

Hello,

I am trying to connect two Arduino UNO'S together using two RS485 boards. My goal is to have the Arduino Uno's communicate with each other. I need to know where and what pins to attach from the RS485's to the Arduino UNO's. Attached below is a link to the RS485 boards I am using. Please help!!!! Thanks!!!

LINK: Amazon.com

Amazon does not make boards. Post a link to the manufactures site.

This is the link to the RS-485 from the manufacturer, UXCELL. Please help with the original question!! Thanks!

Link: Buy Cheap 5V MAX485 TTL to RS-485 Adapter Module for MCU Development Board

http://arduino-info.wikispaces.com/RS485-Modules

http://arduino-info.wikispaces.com/SoftwareSerialRS485Example