Production Version - Modes

Hello.

My question is:

Using in my production version. My product have in rounting transaction(CA03) a few sequences. This sequences after exported to SCM became modes.

In SCM, my product have one product version and 3 modes: Resouce A, B and C.

Until here, everything is ok.!

My question, if i create one manually order. Always SCM selects the first resource(in this case A).

Is there a method to change this resource? For Example B

Thanks and best Regards