The usual way is to insert the rear of the seat bottom under the squab (the seat back) and then push the front of the seat base down until it locks in.
You may need to push the seat bottom toward the rear to help it locate.
The usual way is to insert the rear of the seat bottom under the squab (the seat back) and then push the front of the seat base down until it locks in.
You may need to push the seat bottom toward the rear to help it locate.