There’s not a way for this to work from a hardware perspective. Norns and Ansible are both USB hosts, they are both expecting you to plug in a USB midi device. A USB A-A cable should only be used with Ansible when it’s in bootloader mode and should not be used with Norns – both machines will be trying to supply USB power and current may go Somewhere, could be Somewhere Bad. Norns USB mini port (for supplying power) uses an FTDI chip (for connecting a terminal session with screen) so Norns can’t act as a class compliant USB midi device.
The closest thing to what you want here is possibly Norns connected to Crow and Crow sending i2c messages to Ansible to control gate / CV outputs. In that case midi is not involved at all. Or there are some approaches people have found for sending midi between 2 different USB hosts but it requires another microcontroller in the middle, for example 2host.