MultiOS_3in1 (Android+Libreelec+Linux) install to eMMC

Can’t boot the image. I’ve tried to enable multiboot manually (I don’t want to erase emmc to android) but it doesn’t work in any way I’ve tried. LibreELEC for the VIM2
all resulted in
** Unrecognized filesystem type **

I’m using VTV_20180117 KVIM2-emmc.img

Please tell me what are correct commands to boot from SD and from Emmc for VIM2?