Defense Secretary Frank C. Carlucci reiterated Wednesday that under an accord ending the Soviet occupation of Afghanistan, the United States will continue aiding the Afghan rebels while the Soviet Union supplies weapons to the Marxist government. "We have negotiated what we call positive symmetry with the Soviets," Carlucci said on ABC-TV's "Good Morning America." "That is to say if they continue their aid to the puppet government, we will continue our aid to the freedom fighters." Under the U.S.-Soviet agreement, which Secretary of State George Shultz will sign in Geneva on Thursday, the Kremlin will begin withdrawing its 115,000 soldiers from Afghanistan on May 15. The rebels have rejected the peace pact and have vowed to continue fighting. Under a compromise with Moscow, the United States will continue sending weapons to the rebels, while the Kremlin continues providing arms to the Marxist government.