In small bowl, stir together sour cream, mayonnaise, picante sauce, chili powder and green chiles. To assemble sandwiches, slice each biscuit in half crosswise. Place 1 fish fillet on bottom half of each biscuit. Top each fish fillet with about 3 tablespoons cabbage and about 2 tablespoons sour cream mixture. Top with remaining biscuit half. Serve immediately.