Is it possible?

Hello,
I have this plugin and no problem with, thanks a lot.
I have a question: is it possible to modifie code, because I would like to have with “mondial relay”, I would like customers choice adress.
the widget is : http://widget.mondialrelay.com/
(I have code id).
Is it possible?

https://ww.wp.xz.cn/plugins/table-rate-shipping-for-woocommerce/