This is my fastCFWswitch config but did not change anything from hekate.
Just created Payloads folder on root and place hekate_ctcaer_5.6.5.bin in this folder
[ANDROID]
name=Android
path=/payloads/hekate_ctcaer_5.6.5.bin
bootpos=2
Which file you need to know from bootloader folder?
If you installed android using hekate and an official image, its probably using the default settings, which means its config is in `bootloader/ini/00-android.ini`.
So its probably using the hekate boot id `SWANDR`.
Also if you unpack a hekate release, there is always a .bin in bootloader folder named `update.bin`, which is always matching the bootloader folders version, so its a good idea to use it as payload for hekate.
So with those two things in mind a config could look like this:
INI:
[ANDROID]
name=Android
path=/bootloader/update.bin
bootId=SWANDR
[UBUNTU]
name=Ubuntu
path=/bootloader/update.bin
bootId=SWR-UBU
[ATMOSPHERE]
name=atmosphere
path=/atmosphere/reboot_payload.bin
[HEKATE]
name=Hekate
path=/bootloader/update.bin
bootPos=0
[UMS-SD]
name=UMS-SD
path=/bootloader/update.bin
ums=sd
I also added entrys for Ubuntu, rebooting atmosphere(same as selecting reboot in the power menu), Hekate main menu and hekates SD usb access, but the first lines should be most important for your problem.