Be advised, the OP's device has not yet been ported to OpenWrt: AP143 firmware spkg
This was covered in the previous thread. The OP doesn't [seem to] understand that a firmware has to be developed for OpenWrt; and despite this, will continue to insist you instruct on how to flash/boot it anyways.
It seems as if the OP believes you can just piecemeal a working image together from the /boot and root folder of another firmware. In the last thread, the OP insisted that I make a firmware; but never even provided information on the files. Perhaps you should ask the OP if they think this is possible; and if yes, why haven't those steps been undertaken themselves already.
(I directed my response to you; because he's requested I not speak to him again.)