How to change charger output

I have a LTX charger model: LT250-16L. I notice that there are other boxes on the charger with different model #'s. I recently purchased more cells and would like to charge my 23s lifepo4 pack. I was wondering if I can take apart the charger and change some resistors or something and make the charger like the model LT250-24L and if so, how do I do it?
Thank you

23s is an unusual amount of cells.... 20, 22 or 24 is 'standard'.

Get yourself an Adaptto controller and BMS - which also acts as the charger when used with a PSU if your wanting a safe and reliable and quality system.

So how much higher do you need? See if the trim pot inside will adjust it enough for your needs. As you trim up volts, you will need to trim down amps, or the charger will run hot.

Good clear pics of the charger naked, for anybody to tell you which pot is the amps. The volts one will be very very close to the DC output wire.

no way to know how to adjust it until you show some useful pictures. some of them require more than a little skill to change the set point.