This is is a bottom cover for the exposed pdb on the Tarot X8 frame. Originally it was covered by a flimsy piece of foam, and any water strikes to that area potentially will cause a short between your main batt leads. Not good. There are two versions of this PDB cover - one with batt lead holes for those whose batt leads are coming out from the bottom, and one without, for those like me whose batt leads come out from the top of the plate. Secured using the 4 original screws and will hold the PDB portion on the top part of the plate.