Repair actual – choice assignment sales orders

Hello,

Is there any possibility to choose SO to which I want to assign actual cost ( RO tab repair actual) ?

current functionality example :

1) Create RO

2) Create SO_1 via RO logistic tab

3) Create SO_2 via RO logistic tab

4) create repair actual

5) Reserve Repair actual - actual cost assign to SO_1 and I do not have the possibility to influence it

Thank you

Petr