Just drape pieces on the vine! Thats what i do with my roomates male veiled and he wont eat them with me watching but i'll "leave" and peek around the corner at his cage and he'll climb right up to em and eat em off the vine.
i rip mins into slender pieces and put them in his way of getting to his favorite spots. he doesnt like anything stoping him from getting to his favorite spots so he eats what ever is in his way. he used to like them a lot but not really anymore. he likes fruit more.