Commentary for Judges 4:17

To the tent: To the side of the tent.

And Sisera had fled: He did not flee to the place that his camp fled, as they fled towards their land, which was Haroshet-hagoyim; and Barak and his people chased after them and smote them with the edge of the sword. But Sisera knew that he could not escape by [just] fleeing, for they would catch up to him. So he fled to another place, in which they would not notice him and chase after him. So he fled to a different place close to the war's location, to escape to Yael's tent. For there was peace between them, so he thought that he could escape there and she would hide him until the war had passed.

For there was peace: And because of this, he thought to escape there.