Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to assemble & install an advantage glideaway bike carrier [title] Locate the receiver tube assembly (the heavy sub assembly wrapped in the brown corrugated insert) and the upright (the t-shaped component). [step] These two parts make up the base components for the rack. [title] Place the upright in position perpendicular to the receiver tube assembly.

Ending1: [title] Locate the side mounted bar with the rear of the upright plug on it. [step] Include 2 horizontally pointed v-holes (on both sides). Ending2: [step] You will need to position this position with the pvc tubing directly touching and the hose tube facing away from the receiver tube assembly. [title] Brace the upright for bolt thickness (first 1.5 mm) and a pulley on either side of the bolt. Ending3: [title] Strip the base assembly except for a single flap keeping the unit in place with two screws. [title] Use two large screws just offset from the receiver tube assembly (to fit behind the pole) and clamp, then remove any screws. Ending4: [title] Align the holes of the receiver tube assembly articulating arms with the lower two holes of the upright. [step] ( make sure the center hole in the top of the receiver tube is facing upward).

Answer format: ending1/ending2/ending3/ending4