FR 2972 then FR 1986 at Dublin
Kaunas → Dublin → Nantes
Timetable, Dublin time
23:10FR 2972 from Kaunas at the gate
12:55FR 1986 to Nantes leaves the gate
13 h 45 apart on the timetable, overnight
FR 1986 leaves 13 h 45 after FR 2972 arrives on the timetable: more than half a day, so not a connection we count.