C++ API: How to connect two cells?

[jcma86]

Hello, for an extension, How can I connect 2 cells in a module using the C++ API?
The output of one cell is one of 'n' inputs of the second cell.

I tried several ways, when I "dump" the design to a json file (pass "write_json") I get the ports, with the same bit, but in both cells the port's direction is "output", instead of being "input" for one and "output" for the other.

Can someone provide a basic example of how to do it properly? (2 cells, 1 output each, 2 inputs for each one, but the output of one is the input of the other)