This is supposed to be flashed via adb.
You can do these commands in Linux
If you have Windows:
Either install "minimal adb"
Or perhaps it's easier to just install MediaTek SPFlashtools
( the tool we use to flash stock rom, and it's available on the bootloader unlock topic, it's needed to flash the unlock Bootloader)
, load the scatter, and on recovery , load this custom recovery.img
Which is not correct at new installed tablet. I made all wipes but there is a mistake somewhere.