FeynArts Model File: Coupling & Writing 4x4 Matrix

[Hassiba]

Hi;
Thank you so much in advance for any help.
My question about FeynArts model file, I have coupling of my model and I did arrive to insert (write) constant 4*4matrix in generic model file in Feynarts or I should write it in model file.
Thanks again

 

[Hassiba]

These are couplings of my model:

but I have assumed $\theta^{\mu\nu}$ as matrix as following :

$\theta^{\mu\nu}$
=\begin{pmatrix}
0 & -1 & -1 & -1 \\

1 & 0 & -1 & 1 \\

1 & 1 & 0 & -1 \\

1 & -1 & 1 & 0

\end{pmatrix}

Would you please help me how can I insert this matrix (write this matrix in FeynArts) in this case.

Thank you so much for your help