I am needing help to move level BP code into a BP class

Hello, i’mnew to UE BP and i am trying to get my door here to open from a BP class instead of the level BP code. I will be placing many of them and i cant seem to get it to work using BPclasses.
I have it working fine in level BP as the mesh has a top half and a bottom half. The top half slides up on the z axis and the bootom slides down on the z axis when the player enters a trigger box area near the door. The trouble i am having is when i try to implement same code inside a BP class i cant reference the seperatedoor parts in order to get the actor locations in the world to set my timeline node with. I am new so this is only confusing me the more i try and i would like to ask for help. thank you