Rectangular hole for reverse mount smd leds.

Hi there!

I wish to know if it’s allowed in the Fusion Service to have components that need a rectangular hole instead of a normal one.

In particular I need to use a reverse mount smd led with a window in the pcb of 1.6x1.5 mm in order to be seen from the other side of the board.

In case that there is no problem, in which layer of eagle must be drawn the contour for drilling? (I’m not finding an existing part so I’m designing a custom one).

Thanks in advance for your support.