Thanks for tagging me @drew_morework
My preferred method is exactly what you already described (inserting spares directly through the Terminal Strip Editor).
Since this report is generated directly through TSE, I'm not sure if a user post can be called from within it to manipulate the output data, but we can definitely use AutoLISP to update the table after it's placed in the drawing.
@rickstarosto4361
Regarding your original question ("Is there a way to insert a terminal block into a drawing and tag it as spare?")
If you want to place the terminal in the schematic and tag it as a spare, I recommend using the type with Terminal Number.
This lets you manually declare a terminal number, unlike wire number terminals, which automatically inherit the wire number.

In the table below, two spare terminals were inserted into the drawing as symbols, and two were inserted via TSE (like Drew mentioned).


If you want to populate the Wire1 and Wire2 columns with "SPARE SPARE", we can easily write a LISP routine to scan for spare rows and update them.
Let me know if you're interested! Just post a "before and after" screenshot of a manually updated terminal table, and I can help write the script for you.
Cheers!
Arshdeep Singh
Electrical Designer & Programmer
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