The place to collect valuable information like serial pinout, how to open the case, current support status etc. would be the OpenWrt wiki.
Currently there is no devicepage for this device.
If someone wants to create a devicepage:
https://openwrt.org/meta/create_new_device_page
In case you do not already have an OpenWrt wiki account:
Applying for OpenWrt wiki account
Your support is appreciated! 