2013 Prius Two: Adding an auto-dimming & Homelink mirror

Good afternoon everyone, I just bought a this mirror from a seller on Ebay, all the description says is that it comes from a 2012 Prius. When I ask the seller if the mirror comes with all the cables necessary, he replied with "it's located in the center of the headliner under the plastic cover."

I am afraid that he believes the car comes pre wired for the mirror so he will not be including any cables.

My question is, where would I be able to get the cables if they don't arrive in the package?

Thanks for your help in advance!

 

Hy Everyone!
I finally figured it out with some time and patience.

• I bought a used Gentex mirror from a 2012 Prius with an FCC ID NZLOBIHL4
• I bought a 10 pin wire harness but it didn't work so with the help of a post on here I went to TigerDirect store and bought 6" F/F Premium Jumper wires, spliced 3 of them to the 3 wires that came out from the Wire Harness I purchased.
• The wiring diagram attached shows what the wires are connected to. Hope it helps!