Why use Jamba for this? Just use a keybind or the macro setup as described by the mod.

Macro

The recomended way is to use a key binding or the macro.

The macro can be created using the Help screen, or create one by yourself with this contents:

/click [button:3] SmartMount_Button MiddleButton; [button:2] SmartMount_Button RightButton ; SmartMount_Button LeftButton