networking – Can we connect 2 cat6 cables as a input to a cat 6 jack

I am new to this networking. I am trying to wire my house with lan cable.
I wanted to know whether we can connect 2 lan cables as input to cat6 jack. As a result I want those 2 cables which we connected as input to be joined. Also I will get the output slot to plug in for use.

Please let me know if any other better ways are there.