Need to create $0 SC in classic SRM 7.0 into PO in ECC

Hello Gurus,

We are on SRM 7.0 EhP1 SP Level 7 using classic scenario.  We have a requirement to be able to create a $0 shopping cart in SRM and them have that create a $0 PO in ECC.  Creating the SC is fine, but need to know how to resolve creating the $0 PO in ECC.  Is there any config that needs to be done to make this happen or will this be Abap development required.  If there is development can you please provide a sample code.  Appreciate any help for this.

Thanks,

Jeff Miller