Definition for location file type and message in profile.xls

In the profile.xls file in the FIT-sdk, the file type for the location file found in, for example, Fenix 6 is missing, and so is the definition for the location message.

By looking into the file I have found that the file type is 8 and the message number is 29.
Where can I find the proper definition, especially for the message content?

The location file is where all the waypoints you set on the watch is stored.