Upgrading Cart with current Lithium batteries.

[Tasher80]

Okay I know I have gone down a few different routes on here but everything through EZGO is so expensive and they really bind you to their OEM stuff. I want to take my 2018 EXGO RXV Freedom Elite Lithium batteries out and go with the Eco EB 160 AH batteries. I know I will need a new controller and have been told I need a new wiring harness but the wiring harness 671770 on ezgo looks like it is used on the Lithium and the Lead Acid battery units. I know with my current setup the battery BMS communicates with the controller and that is why the two need to be replaced. Can anyone link the 600 AMP Navitas controller I would need and which harness I would need to switch out?