Simulink: add_line - how to assign signal label position

I'm using add_line to add signal lines to a Simulink model from a m-file.

With set_param(line_handle, 'Name', 'Name of the Signal') I can add a name to the signal that is displayed by the name label.

How can I change the position of this label?

By default it is located below the line at the outport of the origin block but I need it below the line at the destination block.

get(line_handle) lists all parameters of the line object but it doesn't seem to have a parameter for the position of the label.

Can anyone help?

Thanks

Kevin

[Kevin]

I'm using R2013b.