My take, neither Roth nor Ola were after any information from Fredo at all whether it be the Havana deal or Pentangeli-Rosatos meeting because I believe, both Roth and Ola knew / would have known, Fredo didn't / wouldn't have any -- Roth didn't need any!

It seems to me Fredo's "little help" was opening the drapes which is the only viable help that I can see Fredo [needed to] pulling off that is useful.... not different to your [previous] train of thought

All Roth wanted, Michael dead and for Roth to continue living his retired investor on a pension!