Retention on invoices

I've been searching on adding a retention payable and receivable account as we are about to go live with Procore and I was told I need to do this.  My question is this...based on what I'm seeing here, once I set these up, I would add a line item to my invoice that is just "retention" (or whatever I choose to name it).  However, right now, we enter it in as part of the invoice, for each service provided, and when payment is made, it just shows some payment (for us 10%) is still due.  If I add a retention due line item, it will not account for it properly as it's just a catch all and won't show up under each service provided, correct?  Unless I set up retention payable and receivable accounts for every service?  Which seems to be a bit much.  Am I overthinking this?