There (εκε). Out there, outside the house whence they are driven.

When ye shall see (οταν οψησθε). First aorist middle subjunctive (of a late aorist ωψαμην) of οραω, though οψεσθε (future middle) in margin of Westcott and Hort, unless we admit here a "future" subjunctive like Byzantine Greek (after Latin).

And yourselves cast forth without (υμας δε εκβαλλομενους εξω). Present passive participle, continuous action, "you being cast out" with the door shut. See on Matthew 8:11 for this same picture.