Orders and Cart2 - how to set template

[frankmanl]

I use modules Orders 1.15.3 and Cart2 1.1 (in combination with Products).
I made custom templates A and B for both Orders and Cart2.
For both modules template A is default.

To use template B with both modules I use tags like
{Cart2 action='viewcart' viewcarttemplate="B"} and {Orders template="B"}.
But then, when a client processes his order and fills out the form with name, address etc., the following confirmation page shows Cart2 using its default template A.
How can I force template B here?