Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_63986 ( "Team #1" text, "Agg." text, "Team #2" text, "1st leg" text, "2nd leg" text )

### Question ###
What was the first leg score of the matchup with a 2nd leg of 80-70?

### Accurate SQL ###

SELECT "1st leg" FROM table_63986 WHERE "2nd leg" = '80-70'