The present invention relates to an installation kit assembly for convenient installation of a drawer dishwasher in a cavity of a kitchen worktop, such that the front of the dishwasher is directed out from the cavity, the cavity having at least one inner wall. The installation kit assembly comprises, at least one fixation means, having a first part and a second part, which are foldably interconnected, at least one first attachment means for attaching the first part of the at least one fixation means to the inner wall of said cavity, and at least one second attachment means for attaching the second part of the one fixation means to the front of said drawer dishwasher. The invention also relates to a drawer dishwasher comprising an installation kit and to a method for installing a drawer dishwasher.