How to install a Synchronizer between two server installations?

While attempting to install my first synchronizer, I searched and found so many confusing articles and say different things and all of them are on the wso2 website. It took sometime for me to be guided properly so I want to share my experience with you so you don’t suffer

According to wso2 website, there are 2 ways to install it:

1- SVN-based Deployment Synchronizer

2- Registry-based Deployment Synchronizer

I chose the second option which is Registry-based Deployment Synchronizer because it was recommended by wso2 to be surprised later that this option has been deprecated for Carbon 4.2.0 and newer products. Now, I am left with no choice but option 1.