What is powered by "backup fuse"?

I just picked up a 2008 WR250R and am fitting it for me.  Can't wait to get riding on it.  In checking things out, I see in the fuse panel a fuse labeled "backup fuse".  Can anyone tell me what this controls?

I want to put a 12 volt Powerlet socket on it and would prefer it to be switched (not directly off the battery) so I'm looking at what does what in the fuse box.

Thanks!

It's a backup fuse....As in it's a spare fuse in case you need a spare.....

The Service Manual shows it under the EFI circuit diagram.

I think the spares are labeled "reserve".

Well, I did wonder if "backup" might mean "spare", but since the three at the side that are labeled spare, I figured maybe the "backup" actually powered something.

Okay. Followup question. Is there an online service manual or an easy place to acquire one? I have one for my V-Strom and do a lot of my own maintenance. It's nice to have one for bikes that I plan to keep and I think the WR250R will be a keeper. Besides, having the service manual will help me wire up the power outlet. It makes it easier to trace the switched circuits.

Thanks for your help!

check your PM

I think it powers the "backup" lights...when you're in reverse...