adjustable suspension of a motor for positioning the support relative to its

The invention relates to a method of mounting a motor module (1) in a holder comprising a first structure (3) and a second structure (2) offset relative to the first structure (3), method for positioning at least a fixed part (4) of the motor module (1) with respect to an element (6) of the second structure (2) by means of an isostatic suspension connecting the motor module (1) by first connecting rods (10a, 10b, 10c, 10d) to said first structure (3) and second rods (10, 1 0f) to said second structure (2), the length of said first and second rods being predefined, characterized in that one adjusts the length of at least two (10c, 1 0f) of said first and second rods relative to their predefined length, for positioning said fixed part (4) of the motor module (1) relative to said member (6) of the second structure (2) in said support. It also relates to said carrier with adjustable connecting rods, in an installation including a auxiliary power unit for an aircraft.