Converting ICA decomposition with 2 variables A_ffdiag and W_ffdiag into MNE mixing/unmixing matrix

Hi,
I am looking to convert ICA decomposition (using joint diagonization algorithm) which have 2 variables A_ffdiag and W_ffdiag of shapes A_ffdiag : (116, 30) ,W_ffdiag : (30, 116) into the MNE mixing/unmixing matrix in the ICA instance. Can somebody help me in solving how can I convert these two variables into mixing/unmixing matrix?
Thanks