Is it possible to expose dispatcher's self pin?

I got dispatcher that I’m calling whenever I drop an item.
I got collision box that binds event to mentioned dispatcher when dropped objects is in collision.

It looks like on the screen below. My question is: Is it possible to expose self node so I will get object reference that called dispatcher?(Part drawed in paint)

EDIT:
I know I could add another pin and call it self like on the screen below but it feels redundant. I was wondering if there is any build in option for that