Is it possible to add two 12v batteries in parallel to the 5 x 12v batteries that run in series in my 60v scooter?

I have seven 12v batteries, all exactly the same. 5 of them are joined in series to create a 60v bank for my scooter. I want to know if it is possible to connect two of the 5 each in parallel with one of the remaining two batteries, so 3x 12v 20a And 2x 12v40a, all running in series?
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