CREATE TABLE table_12740 ("Home  ( 1st leg ) " TEXT, "Home  ( 2nd leg ) " TEXT, "1st Leg" TEXT, "2nd leg" TEXT, "Aggregate" TEXT)

What was the first leg home that had a total aggregate of 3-1?
SELECT "Home (1st leg)" FROM table_12740 WHERE "Aggregate" = '3-1'
SELECT "Home (1st leg)" FROM "table_12740" WHERE "Aggregate" = '3-1'