Dual Transformer to K8060

Just assembled K8060, now I discovered that “dual” comes in 2 forms.
3 wired connected with base and in 2 pairs non connected base.
My problem is that the Transformer I have is a 3 wired output.
And the k8060 demands a 2 pairs connection.
How do get arround this, in a correct way.
Without anything goes wrong.
Meaning make a 3 wired dual to a 2 pairs dual.
Is it possible?
Would really hate to buy a new one for this, Since Transformers are not that cheap.