To do so you’d need to completely override the template currently in use, for that section we don’t recommend doing so.
Also, I’m not sure how it would work to include the link there as the link would take you to a separate page on the front end to make a payment, the admin section you had just opened and selected to apply a payment would then be out of sync with the transaction. Meaning the page needs to be refreshed to view the payment anyway?
So may I ask why you want that specific link there, and how you envision this link working when appling a payment?
(Note – we have no plans to add any ajax to that section to load payments ‘as they happen’ as this would be a very specific edge case)