Charging 18650 Li-ion 3S2P Pack: Seeking 0.5A-1A Charger Scheme for 4.1-4.2V/C Cell (BT Speaker)

Hello !
I am struggling with the problem of charging a 18650 cell package. I have them connected with baskets in a 18650 package (as in the attachment, the cables are connected in a further section in parallel).

Anyone know of any charger scheme that would manage to charge it with 0.5a-1a current to max. 4.1-4.2 (per cell)? I am not smiling about buying a modeling charger, because the whole thing will be in the bt speaker. It would also be nice if the charger could be connected to the outputs from the baskets.
best regards

To properly load a 6-cell packet, you need to connect them two in parallel and only such packets connect in series. To this you add a balancer and 3S charger - to buy from our expensive ones Chinese friends.
You must use TWO balancers with your connection.

Thanks for the help. Fortunately, I have two unlinked laptop packages. Could you send me a diagram on how to connect something like this?

Added after 15 [hours] 29 [minutes]:

In my baskets it is enough to swap 2 cells for the parallel system to come out. I made a schematic, at 3s2p it would discharge the system to the speaker, when charging I swap the cells for 6p system (for loading such a balancer it is not necessary from what I know). It makes sense ?