2) Prepare 4 bolts assembly by inserting lock washer (#D), then flat washer (#C) onto bolts (#A). Secure corner holes of the seat (#2) to chair back (#1) by using bolts (#A). Full tighten all bolts (#A,B). 1) Prepare 3 bolts assembly by inserting lock washer (#D), then flat washer (#C) onto bolts (#B). Insert dowel (#F) to the middle hole of the chair back (#1). Align seat (#2) to the holes of the chair back (#1), then secure by using bolts (#B).