this is a excerpt of my wiring. I left everything i dont need for this question.
When i charge my board i deplug the xt90 plug from the parallel adapter from the vesc .
Then i deplug the parallel adapter (blue filled plugs) 
After that i plug my dual charger in the two separate charging wires 
I am doing part  because i think it is not a good idea to have a connection (parallel adapter) between the two batteries. Am i right? Does it matter or do i am able to leave the parallel adapter plugged?
Maybe you have a better idea?
My goal is to create an easy solution for charging my board without the need to disconnect anything at all: just plug two charging cables into it and get ready for charging.
Thanks in advance