If this guide is part of the OLI Systems training, you can find official documentation on their website. To help you better, could you please clarify: did you download this file from?
Ensure you have SS-Oli-008_v.7z.001 and SS-Oli-008_v.7z.002 in the same directory. SS-Oli-008_v.7z.002
If you have the first part, I can provide instructions for extracting it. If this guide is part of the OLI
Use software like 7-Zip (recommended) to extract the files. SS-Oli-008_v.7z.002
Right-click on the .7z.001 file, select 7-Zip, and choose "Extract Here". The software will automatically combine both parts to extract the content.