The Triumph pannier and harness are for the right hand side. The Pannier is number 6 shown in the diagram and the harness is number 10.
This item fits the following models: Triumph Liquid Cooled Bonneville T120 > AC6129, Bonneville T120 Black > AD0138, Bonneville T100, Bonneville T100 Black, Bonneville T120 AD0139 >, Bonneville T120 AC6130 >, Street Cup, Street Twin > AB9714 and Street Twin AB9715 >.