#3 are the Rear Seat Belts.
#1 are the Front Floor Belts.
The chrome washers are for shoulder harnesses which you do not show bolts for. The chrome washers go between the belt mount tab and roof. Shoulder harnesses use a bolt with a shoulder about 1/2 the length of the front floor bolts. I use the term 'shoulder' to refer to the smooth, non-threaded section between the bolt head and the threads.
Red dimpled washers are for the rear seat bolts. You will want to use the shop manuals for reference on how the washers are all placed, I usually find differing placements depending on if the car had been messed with, or not. Rubber washers are for front floor bolts and same with wide metal washers which should be under the belts/retractors, touching the floor, under the carpet.