I think both are used here. I'm in New Jersey and I use "towards" all the time. https://www.merriam-webster.com/words-at-play/toward-towards-usage
because in this case the past participle has to change into "vista"..
the verbs with the auxiliary "avere" adapt the past participle in gender and number if there was an atonic object pronoun.
L'ho visto (I saw him)
L'ho vista (I saw her) but: Ho visto lei (tonic object pronoun, the past participle doesn't change)
Li ho visti (I saw them (male))
Le ho viste (I saw them (female)) but: Ho visto loro (tonic object pronoun)