Remember, teams check in at the end of Leg Two around mid-day of the 1st. If teams are released from Santiago/Valparaiso on the morning of the 30th (following the assumption that gloves=morning), that means a daytime bus ride would result in an overnight stay somewhere around Puerto Varas. Would that be at the Onces as Peach pointed out (any insider info?), at the Temuco bus stop, or maybe in the cabin Jet/Cord are searching in? It's a 13.5h bus ride to Puerto Varas, 9.5h to Temuco.
Jebber has the teams in Argentina, so I'm pretty sure that's Leg Three.
Hypothesis: Travel to Temuco by bus, arrive around sundown, find a departure time in the cabins a la Southern Colonel in TAR 8 (Jet/Cord doing the OK sign), depart the next morning by taxi.