Need help on treasurebox system

hello guys,

i need a little help on treasure boxes. i manage to add the system treasure box but i need a help on the key part something.

here is a screenshot
Screen

when i double click the key of the treasure box the key is not sent to the key slot (2nd Slot) i need to drag the key to the key slot in order to open the treasure box. But i want to make it instead of dragging the key to the key slot it will be automatically placed there if i double click the key.. where can i edit it? i need a little help and tutorial on how to do that.. :$::$:

thank you in advance :ott: