i have a multiparm block with two ordered menus inside that get populated from their menu scripts. Menu A, Menu B
So these becomes
Menu A1
Menu B1

Menu A2
Menu B2

...etc

Menu B# needs to reference the other and i cant figure out how to get the current instance the script should be reading from.

in the attached images - 'variation' menu script needs to reference 'plant'

it was easier than i thought, here is the solution for anyone interested
two menu scripts in a multiblock folder.
A list feeds to B for every instance