This document shows an indicative layout for the site with the only access (‘Primary Access’) through the industrial units on Crown Top Lane from Queensway.
A secondary access point via Trows Lane is shown for emergency vehicles only and would probably be gated and locked.
There are another 2 docs associated with this site which you will find at:
https://www.greatermanchester-ca.gov.uk/what-we-do/housing/gmsf2020/supporting-documents/
You’ll need to select the ‘Rochdale’ zip file
which will download all those relating to all the sites across Rochdale Borough