Populating PYMNT_MESSAGE thru Voucher build

Hello,

We have an app engine program to populate the voucher data (header,line and distrib)  from custom staging table to main voucher table  and then run the delivered voucher build process to create the voucher.  We have requirement to map the field "supplier note" from custom staging table (header) to PYMNT_MESSAGE in the ps_pymnt_vchr_xref

 

Is there any  staging table for payment  to populate field as similar other voucher staging tables? Please advise the best way to handle this requirement

 

 

Thanks,

Selvam