Abstract: A line guide assembly constrains the movement of working lines, such as hydraulic, pneumatic and electrical lines, that connect an implement attachment, such as a mulching head, to the main power and controls of a working vehicle, such as a skid steer loader. In one form, the line guide assembly has a mounting bracket for connecting to the mounting ear of the implement. An extension arm is coupled to the mounting bracket to accommodate articulation or other movement of the implement. A guide is connected to the extension arm, directly or via an additional cross-member. In one form, the guide defines a catch or loop that receives the working lines running to the implement. As the implement moves the extension arm pivots and the guide engages the working lines, which move through the guide opening, to constrain the working lines to a desired area between the loader and the implement.