CRM 2016 - Opportunities - Linking Closure Reasons with Status Reasons

Hello,

I am trying to add 'Closure Reason' to a 'Status Reason' in the 'Close as Lost' option for 'Opportunities within Dynamics 2016.

I have found the area to add them into:

Settings > Customisations > Customise the System > Entities > Opportunities > Fields > Closure Reason > Edit

I am able to create the new Item but have no idea on how to link it to an already existing 'Status Reason'. I have seen the Status Reasons section in 'Customise the System' but can't see a linking option there.

Any help would be greatly appreciated as I have 17 of these to add.

Thanks!