Pass reference to 'Run on Server' Event

Hi, I want to pass a reference of the myCharacter BP through a custom event that is set o RunOnServer. I tried passing it by making an input of the ‘MyCharacter’ type and plugging a Self Reference into it, but that doesn’t seem to work.

What I want to do is the server to detach one object from the character and attach another for that I need the character reference and the character mesh, i tried passing them both by making input pins and connecting them to a self reference and a character mesh reference but it doesn’t seem to work.