Sorry, it’s not clear what you are trying to accomplish. Typically, Wet/Dry and stereo do not co-exist, you either do one or the other. You can do a Wet/Dry/Wet rig if you want it in stereo.
You may be able to accomplish what you are trying by following the Parallel example here: https://cdn.eventideaudio.com/manuals/h90/1.7.5/content/setup/wet-dry.html#wet-dry-examples
Insert 1 will be the tap point for the dry amp, in this case it is after Preset A. If you set Insert 1 mix to 100%, this signal will not pass to outputs 1-2.
Preset B will be output to the wet amp, or stereo wet amps if you connect both outputs 1-2.
