I would like to move this scale bar behind the leader lines from my extent indicator:

However, this isn't possible; it seems it wouldn't be possible to put any sort of graphic underneath those lines. The leader lines are controlled by the locator map, the same map that the scale bar is sitting on. If I move the scale bar any lower in my drawing order, it gets hidden.

There's no option to convert to graphics, either:

I'd like to be able to sandwich the bar graphic between my inset map and the leader lines directing you to the inset. It seems that the solution would be treating the extent indicator & leader lines as a separate layout graphic, rearrangeable in the drawing order. Thanks.