If Hearts pull off an upset against Benfica in the Europa League, they will face the losers of the Champions League tie between Danish league winners Aarhus and Sabah of Azerbaijan.
Defeat against the Portuguese giants would see the Edinburgh side take on the winners of the tie between Rapid Vienna and Estonians Paide in the Conference League play-offs.
Hearts crashed out of the Champions League qualifiers in a 6-0 aggregate loss to Sturm Graz last month, losing 4-0 away before a 2-0 defeat at Tynecastle.
Motherwell have German side Freiburg waiting for them in the Conference League play-offs if the Steelmen can get past HJK Helsinki.
The Fir Park side advanced in qualifiers after beating Havnar Boltfelag 5-0 on aggregate.
Hibernian, meanwhile, will play Gothenburg or Gent if they get through against Shkendija. David Gray's side moved on after overcoming a 2-0 first-leg loss to Malisheva by winning 4-1 at home.
