Conversion of Invoices

 Dear All, Our client is primarily having Variable Rate contracts. We are devising strategy for OKL invoices upload. We are looking at two strategies and not sure which path to take and if there is any better path than these two. Your feedback will be greatly helpful.

1) We upload all open OKL invoices lines into AR open interface tables and Upload contracts separately into Contract import interface tables. If this approach is followed then the linkage between the contracts and invoices is difficult. Or is there a way to link these entities? We need the linkage for lots of downstream collections, contract transfer activities.