@Aaron-Bishdou Treat the tuning of a Find & Replace operation as a separate and preliminary task before thinking about macros. It is rare to have to examine npp’s representation of F&R ops in shortcuts.xml at all.
The transformation you are hoping for does not seem complex. If you want help, show explicitly the expressions you are trying in the Find and the Replace fields along perhaps with optional settings in the F&R dialog.
Also, think about whether your sample text captures all the anticipated variation (field names & lengths) in your log files.