I registered Norwegian Autopass / EPCplc on a Swedish rental car a day late. Will the bill go to me or to the rental car company?

I was driving a Swedish rental car in Norway on 1 August when I realised I was driving past an automatic toll collection point. I couldn't reach the internet the same day, but the next morning on 2 August I registered with Norwegian Autopass / EPCplc and added the Swedish rental car for period 29 July to 13 August. The Autopass website did not complain when I tried to register the rental car period back-dated, and the confirmation e-mail said it may be a couple of months before they send me a bill. Does it matter that I registered at 2 August when I passed the toll at 1 August, considering I indicated I rented the car from 29 July? Will the bill go to me or to the rental car company? I'm worried that the rental car company may add a hefty administration fee on top of the modest toll road fee.