I'm having difficulty enabling this cheat, I used to be able to do it blindfolded. But my config file looks different. I can't see where to type the cheat in. Here's a copy of my config:

[ipx]
ipx=false

[autoexec]
# Lines in this section will be run at startup.

@ECHO OFF
mount C ".."
mount C "..\cloud_saves" -t overlay
c:
cls

ECHO ÉÍÍÍÍÍÍÍÍÍÍÍ&I acute;ÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍ&Iacut e;ÍÍÍÍÍÍ»
ECHO º ------------------------------------------- º
ECHO º Wing Commander º
ECHO º ------------------------------------------- º
ECHO º 1) Wing Commander with Secret Missions º
ECHO º 2) The Secret Missions 2 - Crusade º
ECHO º ------------------------------------------- º
ECHO º 3) exit program º
ECHO º ------------------------------------------- º
ECHO ÈÍÍÍÍÍÍÍÍÍÍÍÍ&Iacut e;ÍÍÍÍÍÍÍÍÍÍÍÍÍ&Iac ute;ÍÍÍÍÍÍÍÍÍÍÍÍÍ&I acute;ÍÍÍͼ

choice /c123 /s Which game do you want to run? [1-3]: /n
if errorlevel 3 goto exit
if errorlevel 2 goto sm2
if errorlevel 1 goto sm

:sm
cls
loadfix -1 wc
exit

Any help would be appreciated

Have you tried load fix -1 wc Origin -k?

Yes! this is what I needed to add to the last four lines.

The commands GoG added confused me. I'm used to seeing a smaller config file. Thanks for the help!

Just in case you ever come back and prowl your old post, here's how my dosboxWC_single.conf looked, with cheats working (and for invincibility, which seems too dull to excuse, but hey), change "loadfix -1 wc Origin" to read "loadfix -1 wc Origin -k"

[ipx]
ipx=false

[autoexec]
# Lines in this section will be run at startup.

@ECHO OFF
mount C ".."
mount C "..\cloud_saves" -t overlay
c:
cls

ECHO ÉÍÍÍÍÍÍÍÍÍÍÍ&I acute;ÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍ&Iacut e;ÍÍÍÍÍÍ»
ECHO º ------------------------------------------- º
ECHO º Wing Commander º
ECHO º ------------------------------------------- º
ECHO º 1) Wing Commander with Secret Missions º
ECHO º 2) The Secret Missions 2 - Crusade º
ECHO º ------------------------------------------- º
ECHO º 3) exit program º
ECHO º ------------------------------------------- º
ECHO ÈÍÍÍÍÍÍÍÍÍÍÍÍ&Iacut e;ÍÍÍÍÍÍÍÍÍÍÍÍÍ&Iac ute;ÍÍÍÍÍÍÍÍÍÍÍÍÍ&I acute;ÍÍÍͼ

choice /c123 /s Which game do you want to run? [1-3]: /n
if errorlevel 3 goto exit
if errorlevel 2 goto sm2
if errorlevel 1 goto sm

:sm
cls
loadfix -1 wc Origin
exit

:sm2
cls
loadfix -1 sm2
exit

:exit
exit