@MauroCampos 

3 holes are enough to install the EAP225. We have an installation guide about how to install the EAP devices, please refer to the following website:

https://static.tp-link.com/2019/201907/20190705/7106508372_EAP225EAP245IG.pdf

@forrest 

Thank you I am aware, and have that guide.

However,  that doesnt answer my question.  Other manufacturers have other/additional mounting plates types for the use of electrical boxes. I have not seen anything on the TP-link site. 

@MauroCampos 

Other manufacturers have other/additional mounting plates types for the use of electrical boxes. I have not seen anything on the TP-link site. 

Do you mean that you want to install the EAP on a electrical box and other manufacturers have such ugide? Can you tell us some details about the guide of other manufacturers? After we have a better understanding of your question, we will check if we have more information to provide with you.

@forrest 

please see the attached picture. this is for the ubiquiti ac pro

So for anyone who encounters this.

I used the blank wall plate as a stencil to mark holes on the EAP mounting bracket.

Drilled the holes out with a multipurpose bit at a slow speed.

I then used the mounting bracket as a location stencil for the blank plate.

All in all not perfect but pretty functional.