Transfer Learn like thing using freeze layer node

It's a bit of nodes but Keras freeze layer in the top middle is everything here. I retrained last layer like this.

Is this meaningful???
Maybe not, I mean it didn't make the score any good nor bad.

Looking at this KNIME blog post

https://www.knime.com/blog/transfer-learning-made-easy-with-deep-learning-keras-integration

Should I add layer after training by original model? and is it enough data anyway? There are so many things I can play around with this now but I should do with real life data. Cool play around awaits!!