how to make the pause key switch keyboard variants?

I wish I could toggle the variant using the pause key and not the menu
key as it is currently set on my OpenBSD system---see below.  I'm
looking through files such as

  /usr/X11R6/share/X11/xkb/symbols/us

and the others, but I don't immediately see a description of a pause
key.  Is that possible to do?  Can you point me in the right direction?

b$ setxkbmap -query                                                           
rules:      base
model:      pc105
layout:     us,us
variant:    basic,mine
options:    grp:menu_toggle

b$ uname -a
OpenBSD b.local 7.6 GENERIC.MP#338 amd64