EDL mode RM551E-GL?

Hello there,
I have a RM551E-GL that I made a mistake on an init script that I placed on it and now it’s hanging at it before adbd starts and the USB ports become available.

There’s a way to short the 520 into EDL as seen here: RM520 how to force edl mode?
(Which does work, I’ve done it with a 520 before)

What are the pins on the back of the 551 that need shorted to enter EDL mode?
Thanks!!

I’m looking to find out which ones are VDD_EXT and USB_BOOT.

Thanks!