Service Instance Field mapping in New order scenario in Bulk Order

Hi,

Service Id is cascading down to child Line Items for New Install.
Service Instance Field was mapped from Product and was used to differentiate the Main Order Line Item (MOLI) from OLIs;
But since it is New Install, Service Instance Field would be a NULL value.
Is it possible to get the Service Instance Field without getting to Asset?

The present workaround applied is as given below, it is working fine in case of the modify order, but when user is placing New order it is not working as there is no asset created and as a result of it the Service Instance is got set to 'Null' during Mapping in SIS OM PMT Business Service mapping,