What had to be added to the constitution for anti-fedralists to vote in favor for it?

no, the federalist were in favor of the constitution being ratified, that's why they are called the ANTI- federalists. they did not want it to be ratified

bill of rights

The Constitution didn't have a Bill of Rights, which they believed was needed for citizens in a democracy.

bill of rights,(1st ten amendments

Bill of Rights. Or first ten amendments to the constitution.