A control system for an agricultural vehicle (10) includes a controller (56, 82) configured to calibrate alignment of a conveyor outlet (26) of the agricultural vehicle (10) with a storage compartment (32) by receiving a first signal from a user interface (74, 92) indicative of alignment of the conveyor outlet (26) with a first desired point (160) on the storage compartment (32), determining a first position of the storage compartment (32) relative to the agricultural vehicle (10) upon receiving the first signal, receiving a second signal from the user interface (74, 92) indicative of alignment of the conveyor outlet (26) with a second desired point (174) on the storage compartment (32), diagonally opposite the first desired point (160), determining a second position of the storage compartment (32) relative to the agricultural vehicle (10) upon receiving the second signal, and establishing a bounding rectangle (180) having a first corner at the first desired point (160) and a second corner at the second desired point (174) based on the first position and the second position.