Bow animation

Thanks again for the info.
I’ve made a ‘hide Arrow’ and ‘unhide Arrow’ function within the bow bp. Now I’m trying to cast to the bow from MyCharacter to trigger the hide function when the arrow fires. But I’m not sure what to plug into the object node of the cast. The Cast is failing currently.
e798c13b36960aea2d6b68ea88b5296cb284508e.jpeg