File Upload for Accounting-Transaction?

We plan to use dolibarr for e-commerce where we have invoices/card-transactions in our shop-system (wp with woocommerce). So most data that needs to be booked in accounting we have in pdf or paper form and we plan to book it manually in dolibarr accounting (double ledger) and we would have to label each document on our shared drive with the transaction-id of dolibarr, to allow us to refind it if something is not clear enought in accounting itself (also as a proof for tax etc).

Is there a way we can manually upload a file to an accounting-transaction and list it (for downloading) in the transaction-view? We activated DMS-Module but didn’t see any upload-possiblity.