Lightbulb [Q] BST Dongle for Samsung and most Android devices

Hi,
Some of you might remember me asking in the forum to solve the IMEI problem on a Galaxy S3 NOT REGISTERED ON NETWORK.
I was not able to solve the problem even though I tired the impossible.
I came across a YouTube video repairing IMEI using a software and a piece of software and I was very impressed what this tool can do!!
So, I decided to buy it which had cost me 100$, but even though if it didn't help me solve my problem, I will most certainly need it in the future for ton of things.
It's called BST Dongle.
http://www.youtube.com/watch?v=_RZZrQCm9bQ">http://www.youtube.com/watch?v=_RZZrQCm9bQ" type="application/x-shockwave-flash" width="425" height="350">
Now, I saw some videos on YouTube but I canít see how do you connect the UART r523k
I have that cable and I connect it to that piece of hardware which has 4 ports.
1 port service cable and 1 port USB OUT (I put the UART R523K there and I connected the other end to my phone)
1 port USB IN 1 PORT USB OUT, What do I put there?!!
Please I need help.