Recover spool of step 1 from step2 in a job

Hi!

We have a job which contains one step.

Now, we have to add a new step in order to do some things (we can not change the program of first step)

We need to obtain some information from the spool generated in the first step. How we can get this spool number?

In SY-SPONO we will have this spool number? Also, if first step generates more than one spool number. How we can recover all of them?

Thank you in advance