unplug all others disk drives hard drives any thing that is not needed. all you need is hdd with osx and clover usb drive.
when you use the command "map fs*" it will list all partitions on hard disk and usb drive.
it will name each partition in following order fs0: fs1: etc.
you need to figure out which one is the EFI partition on hard drive.
so example lets try fs1: to do that type "FS1:" and enter. (dont use cd when selecting just type appropriate label such as FS1: )
notice that the shell changes to relect this on command line.
then type "ls" ls is a command that lists all files and folders in the partition we just selected in previous step.
if you see a folder called EFI proceed to next step if not reboot and start over and pick FS2: instead.
then when you see the EFI folder, type "cd \EFI\BOOT" then type,
bcfg boot add 0 bootx64.efi "Clover"
leave the quotation marks in the command above omit quotations every where else you see them in this post.
remove usb restart computer and select entry in boot menu called clover.
follow this post to letter and youll be okay i condensed it just for you
also if you look through the long string of seemingly random numbers you will see somewhere for each one where is says usb or hdd the right one will be a hdd. the ones with usb in the line are the usb drive. so none of the ones that have usb are the right one.