Plastic X-Idler Plate to replace Wood Parts

[printbus]

Does anyone know what that small hole at bottom center of the X-Idler plate is for? Does anyone use that hole for some purpose?

Don't know of anyone who has used it. When I built my i3v-8, I figured it might have originally been for a screw to be used with the original Z-endstop switch, similar to the screw on the Y-bed used with the Y-endstop. It's not in the right position for even that, but that's the best I could come up with.