AMB-2020HT(T)-E User’s Manual 131.7 Waterproof Sponge PositionInside sponge (the smaller one):a. Tear off the protection paper on the self-adhesive side of the inside sponge.b. Stick the sponge on the recessed area of the Aluminum bezel or customer’s own bezel.Outside spongePress close the outside sponge to the edge of the Panel PCFront BezelBack SideOuter SpongeSponge with adhesiveFront Bezel