I'm not sure why you would need a correlation document, or try to adopt the IMDRF guidance. It is a guidance, it provides practical recommendations for how you should implement your QMS.
Most of 7.5 will not apply, but there are a few subsections that do.
For 7.5.1 you could explain in the Quality Manual that this section is addressed by product development process, including design transfer and design changes (assuming you don't ship any media or don't perform installations at customer sites).
You also have to explain or preferably have procedures for 7.5.6, 7.5.8 (configuration management?), 7.5.9, 7.5.10 (data privacy procedures?), and 7.5.11.