Pass the traffic information to the tower Controller and leave the decision of what they do between them and the crew of the aircraft - it's not your decision anymore.
How does that sit with the Part 1:
"Approach control may instruct approaching IFR flights to contact aerodrome control before transfer of control has become effective. Until approaching aircraft are flying with visual reference to the surface, aerodrome control shall not issue any
instructions or advice which would reduce the separation established by approach control."