I am trying to install Kali onto an MK808 computer. I get to step 7 which is;

7. Next overwrite both kernel.img and recovery.img in the FInless ROM directory with the kali “kernel.img”.

I'm probably being silly, but I can't find where the kernel.img is. I looked at the long instructions but I believe it describes how to make the kali-custom-ss808.img

Can anyone please help me out?

Many thanks,