Mikrotik cAP ac installations OpenWrt

Dear All
I have MikroTik RBcAPGi-5acD2nD (cAP ac) and i would love to install openwrt on it but i didn't find any tutorial and as you know MikroTik RBcAPGi-5acD2nD (cAP ac) it has only 2 ethr port POE
and advice from your experience please?
with regards