I assume thats the proper format because armbian-config is the one put that there so I never questioned about it.
so far all of the NAND models seems to have USB OTG working but not all my eMCP boards, it always throw that error I posted earlier.
also for some reason, in NAND models with jumpstart installed on NAND, overlay option on /boot/armbianEnv.txt for some reason do not work and have to resort editing the dtb file manually, all of it from led config to wifi stuff, also enabling the peripheral mode as well. I guess those overlay stuff only works when that u-boot bootscreen on emcp boards I had only have those overlay stuff working but not on the NAND models with jumpstart.
After all those dtb shenanigans, I went ahead and install https://github.com/srepac/kvmd-armbian skipping all the way to step 3, a hour and 2 reboots later, yep its all working now. with 256GB USB flash drive mount on /var/lib/kvmd/msd and running that msd fix sh script to get that USB storage stuff working.
sheesh, this box sure is really hell of a work. if I dont have extra time, id probably not doing this and just buy a cheap orange pi instead.