BigEdP

As the armrest in my 2000 RX300 were getting shabby I removed them and took them to a local upholstery shop to have them recovered. They did a good job and now I have them back. There is a series of washers that need to be put in place for the installation (2 metal washers and one plastic washer) and I need to know the sequence these are installed to get the armrest to function properly. Do all the washers go between the armrest and the seat or do some go more toward the outside of the assembly (on the backside of the hex head bolt? Any help is appreciated. thanks