The product documentation links of SPE for Cloud Services release are collated and are available in the following pages:
SPE 7.8.x: https://support.symantec.com/en_US/article.DOC9246.html
SPE 7.5.x: https://support.symantec.com/en_US/article.INFO3798.html
SPE 7.0.x: https://support.symantec.com/en_US/article.INFO3800.html?
Do feel free to suggest any changes that you think would help you find information better.