I believe those nodes are in the placeable walkmesh (_use01 and _use02). A pwk like this should do:
node dummy c94_pwk_use01
parent zlc_fky_c94_pwk
position 1.0 0.0 0.0
orientation 0.0 0.0 0.0 0.0
wirecolor 0.00 0.00 0.00
endnode
node dummy c94_pwk_use02
parent zlc_fky_c94_pwk
position -1.0 0.0 0.0
orientation 0.0 0.0 0.0 0.0
wirecolor 0.00 0.00 0.00
endnode