An aircraft turbine engine with a main axis includes: an arm that is radial with respect to the main axis, extending through an air flow duct; a support wall belonging to the radial arm and which has two openings; a plurality of electric harnesses extending partially through the radial arm and for which a section of each harness is secured to the support wall of the arm; and two mounting blocks, in which each mounting block is associated with a group of sections of harness.