GL account as default Receiver in Customer Service order during settlement rule

Dear All,

We have a situation, where we need to default a GL account as a receiver while settling the Customer Service Order. We have two order types, say .CS01 and CS02 and each order type has a default GL account to settle.

Manually it can be done while creating a settlement rule, but business needs to default based on Order Type and need not to have manual intervention.

How to achieve this.

Help will be greatly appreciated.

regards & thanks.