Running console program inside pantheon-terminal from .desktop file

Hi guys,
so, i have this program sicstus prolog which is a console based program. (I also run it inside rlwrap because of the arrow keys). I was trying to create a desktop file that launched pantheon-terminal running rlwrap/sicstus so i have this:

...
Exec=pantheon-terminal --execute="rlwrap /opt/sicstus4.3.1/bin/sicstus"
...
Terminal=0
...

Problems:
- if termianl already opened it opens as a new tab.
- else, it opens as it should with the correct icon and such but then terminal runs as a new tab of that program.

I was trying to use the --class/--name arguments of the panthon-terminal hoping it solved the problem but no success.

does anyone have any tips? thanks.