Opencore : How do i enable "BootstrapShort"

[rayceyiii]

Hello.. So i'm trying to upgrade from 0.6.3 to 0.6.4 open core. Since i use a Haswell chip/motherboard, on the official open core ****** it says:
-----------------------------------------------
"When upgrading to 0.6.4
we recommend:

1. Turn off BootProtect (set to None)
2. Make sure that you have RequestBootVarRouting enabled.
3. Perform NVRAM reset (as long as you know it is compatible with your firmware) to cleanup the leftovers of the previous implementation.
4. Enable BootProtect once again. The safer approach is for older boards (approximately Haswell and earlier) to use BootstrapShort and for newer boards go with just Bootstrap.

----------------------------------------------
I went looking for the BootstrapShort in my plist and couldn't find it.. Where/How do i enable this option so i can move forward with upgrading????