EC 1703 then SN 3728 at Madrid
Nice → Madrid → Brussels
Timetable, Madrid time
20:40EC 1703 from Nice at the gate
17:30SN 3728 to Brussels leaves the gate
20 h 50 apart on the timetable, overnight
SN 3728 leaves 20 h 50 after EC 1703 arrives on the timetable: more than half a day, so not a connection we count.