In the following video you will see how to attach a wheel to the undercarriage of your seat. There are a few key steps to be aware of and parts that you need to have.
Wheel, Bolt, Flat-Washer, & Lock Washer.
1 – The wheel is not completely symmetrical, one side has a deeper inset where the bolt passes through – this side should face outwards away from the undercarriage.
2 – Pass the bolt through the wheel.
3 – Add a lock-washer next against the wheel.
4 – Add the flat-washer.
5 – Attach to the undercarriage.