T265l_2_GRIPPER and T265r_2_PYFT

[hakaqaq]

T265l_2_GRIPPER = np.array([[-1,0,0,0],
[0,np.cos(45 / 180 * np.pi),-np.sin(45 / 180 * np.pi),38.53/1000],
[0,-np.sin(45 / 180 * np.pi),-np.cos(45 / 180 * np.pi),-19.47/1000],
[0,0,0,1]])
T265r_2_PYFT = np.array([[-1,0,0,0],
[0,np.cos(45 / 180 * np.pi),-np.sin(45 / 180 * np.pi),81.81/1000],
[0,-np.sin(45 / 180 * np.pi),-np.cos(45 / 180 * np.pi),-19.5/1000],
[0,0,0,1]])
Why is one linked to the 'right' and the other to the 'left' here? There shouldn't be any difference compared to using only 'right' or only 'left' for both, especially if I am only using a single arm, right?