I was looking into this one and I read on Modwigglers that while the outputs are DC Coupled, the inputs are not.
I believe the original intention was that both would be DC Coupled but iirc they ran into supply issues or something like that and had to ditch the DC Coupling on the inputs in order to get the module released.
It may be that the DC coupling on inputs is added in a later version.
Just something to bear in mind if you want to run CV from hardware into Rack - which you may well want to do to take advantage of Rack’s scopes etc if nothing else.