gigabyte rx 560 gaming oc 4 gb

I flash the wrong bios to my GIGABYTE RX 560 GAMING OC 4 GB, and now it won't let me even boot if the card is in. So, after some googling, I see that I need to make some kind of jumper workaround to be able to reflash the original bios. My problem is that I can't find anywhere some picture or...