I answer myself by referring straight to what I think is SplashScreen location. Actually, changing the icon tag name for splash worked for me to set splash screens, just setting the screen definitions after icon definitions:
<platform name="android">
<icon src="www/res/drawable-ldpi/icon.png" density="ldpi" />
<icon src="www/res/drawable-mdpi/icon.png" density="mdpi" />
<icon src="www/res/drawable-hdpi/icon.png" density="hdpi" />
<icon src="www/res/drawable-xhdpi/icon.png" density="xhdpi" />
<splash src="www/res/drawable-mdpi/screen.png" />
<splash src="www/res/drawable-hdpi/screen.png" />
<splash src="www/res/drawable-xhdpi/screen.png" />
</platform>
This is for android, I manage icons and splashes for IOs in XCode, seems to be a bit more reliable than cordova CLI (although not better from my POV). In addition you can store the icon/splash files mostly wherever you want with the names you want (correct me if this is false!!!)
Cheers again