The UConnect Jumper kit is designed to allow you to retain use of your factory microphone when upgrading to an RER or RHR navigation radio.
For the RER, the jumper cable is used, the USB cable in the kit is only for the RHR radio.
Jumper Kit Installation Video
Quick Instruction Guide:
Step 1 : Locate your UConnect module and disconnect both cables as pictured.
Step 2: Join the disconnected UConnect module cables to the UConnect Jumper Kit female plugs.
Step 3: Join the UConnect Jumper Kit male plugs into the rear of the RHR radio.
Attached below is the PDF that is available on the product page which has additional information.