Add custom fields to assignment block

We are running SAP CRM 7.0. We are using the opportunity module as well as "Create Follow Up" (Sales Order / Quotation) so that you have a one to many relationship (1 opportunity may contain many sales orders). I have 2 custom fields inside the Sales Cycle (Quotation) module "Actual Sales Order Value" and "Current Points".

What I am trying to do is take these 2 custom fields and add them to the assignment block called "Linked Transactions" in the Opportunities module. But when I look at all the available fields for this assignment block these 2 custom fields are nt available.

I do not see any way of adding these 2 fields to this assignment block. The only thing I see is "Create NEw Field". But I do not want to create a new field I just want to reference 2 fields from the Sales Cycle module inside of this assignment block.

Does anyone knowif it is possible to add 2 custom created fields that are i the Sales cycle module to add them to the opportunities assignment block that is called linked transactions ?