Samstock Prepoll command for Z2 reports?

Hi,

I work at a small shop which uses an SER-7000 and Samstock 4.8.2. Recently I've been trying to fix a few problems that have piled up over the years, mainly due to user-error and mis-configuration. I've managed to fix most things, but I've hit a dead-end getting Samstock's Financial reports working.

The till has all Z1 & Z2 reports enabled in the memory allocation.
Z1 Financial, Groups & Sales by Time Period reports are printed manually at the end of day as part of the cashing-up procedure.
The shop closes at 17:30, Samstock End-of-Day is set to 19:00, Samevent runs "Z Collect Data (No Retry)" at 23:00.
Samevent works fine with no errors. This is not a communication issue.
I believe Samstock was originally configured to poll the Z2 reports, but the configuration may have been reset at some point.

My research so far has led me to believe that changing the prepoll command will change which reports Samstock polls. However I have found no information on what this prepoll command should be changed to.

Current Prepoll Command setting:
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I understand the the "correct" way to use Samstock is to only run X reports on the till, and let Samstock poll Z1. However I can't change shop procedure and therefore hope that reconfiguring Samstock is easier than reconfiguring humans.

Can anyone tell me the correct Prepoll Command for polling Z2 reports or provide documentation on how the prepoll command works?

Thanks.