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Clueless about MoCA, please help.

New Poster

Clueless about MoCA, please help.

I've read through countless forums and can't seem to find anyone with my setup. I've read through this forum and maybe I'm just not grasping the concept.

To start I have Xfinity for internet and basic cable - we rarely use the basic cable, was just part of the package. Currently have the X1 box along with a second box out in my shop.
My ultimate goal is to get internet out to my shop via coax using a MoCA adapter - then going to a simple router to provide WiFi. My extenders I have now do not provide a good connection as our house and shop are thickly insulated.
I currently have RG6 Coax ran out to my shop, and I have my second Xfinity box out there to watch the games on. Pretty useless as it doesn't provide internet.
I recently purchased an Actiontech MoCA 2.0 Ethernet to Coax adapter. I figured I could simply install this and have hook it up to my router. Well it didn't work. I still had the signal to my Xfinity box, but the Coax light was not on.20190603_164618.jpgCurrent cable sketch20190603_165329.jpg
My current setup:
POI/ISP to a MoCA filter. From there I have it going to a 3 way splitter, one section goes off to my shop, the other goes into the attic which then connects to the item I mention below:
I went up into the attic and found a few things that I was unaware that Xfinity installed.
There is currently a PPC-5M-U/U box in which powers all off the outlets in the house. The input from outside goes into the input side of the PPC box, from there it has 3 outputs going to the rooms in the house, along with another input going into a DC adapter - which then continues to the Xfinity router and cable box in our living room.
This PPC box or amplifier says MoCA on it, and actually calls out MoCA connection on one of the outputs. So do I need to run a length of cable from this input, to a splitter which connects to my shop in order for the MoCA adapter out there to work?
I've attached a sketch of what I currently have, and of the PPC box. Please excuse my lack of knowledge of this technology. I called Xfinity up and they said I would need to get a separate internet plan which i'm not doing. I'm probably just missing something simple. 
Also, I don't care about the other Coax connections in the house as we run everything off of Wifi.
Thanks!

New Poster

Re: Clueless about MoCA, please help.

Sorry, the pictures didnt load before.

One picture is my current cable sketch, the other is the Amplifier box20190603_164618.jpgcable sketch20190603_165329.jpgamplifier