Nakula is in charge of steeds and Sahadeva is in cow-pen and know Sairandhri as Draupadi for whom Kichaka's were slain.
अश्वबन्धोऽथ नकुलः सहदेवस्तु गोकुले। सैरन्ध्रीं द्रौपदीं विद्धि यत्कृते कीचका हताः॥