NVME heat sinks synology?

[Enquiries]

I was considering buying two 1 TB WD Western Digital Red SN700 Solid-State Drive for read-write cache in my synology DS1821+ NAS. you mentioned heat sinks in your youtube video. Will I need to purchase separate heat sinks and if so do you have any recommendations for which model#? will my NAS accomodate such heat sinks?

thank you very much!