Hi Smiller
For the I3C,the maximum wire length would be a function of speed, as all the reflections and Bus turnaround must complete within one cycle.
Larger distances can be achieved at the lower speeds than at the higher ones.
For example, at 1 meter (between Controller and Target), the maximum effective speed is around 6 MHz for read, to allow for clock propagation time to Target and SDA return time to Controller.
So in your case consider about 60cm length communication distance plus two connectors which should speed down to guarantee the communication quality.
Hope this could help you!