How to add embedded report to Account 360 as a new facet

I have a custom report already developed by an analytics colleague in C4C.

I need to add as a new facet into the Account 360 when an account is viewed.  Basically embed an existing report as a new facet in Account 360.

I've tried to add an Analytics report - but that's for creating new reports.  How do I use an existing custom report ?

Do I start with a embedded component to hold the report ? or ... ? 

Appreciate some quick steps.  Thanks !