Connect External dumb access point for openwrt wired router

I am building a router. this is a wired router without Wifi functionality. operating system is Openwrt.. Now i want to connect thru UTP an external Access Point.
Is this possible? and if yes.. how ? i can,t find any video,s on how to set that up.

Any advice would be appreciated. (not questions on WHY i want this etcetc)