6th button (Hard Kick) not registering on Pandora's box 4

[Darklightjg1]

Couldn't really find anything that addresses this directly, but the jist of it is that I have a PB4 hooked up with a JNX Atlas adapter that's supposed to work with a kick harness (CPS2... see picture).
The problem is I'll get the first 5 button inputs for both player 1 and 2, but the hard kick button isn't registering at all on there.

I have a legit Street Fighter Alpha 2 board and the harness works fine for all 6 buttons on that (and I have a CPS3 board on the way in a few weeks and plan on getting some more legit CPS2 games, so I don't want to mess up the kick button setup for those). Has anyone dealt with this? It would be a hassle to have to constantly rewire controls when I want to swap games unless there's a setting I don't know about or an adapter to resolve the issue.

Picture of the PB4 with current atlas adapter I'm using:

[nem]

That's why there's the switch in the corner. Switch it to ELF.

[Darklightjg1]

Switching it to ELF did resolve the issue. Thanks. I didn't know what ELF was meant for.