Hello to everyone's

so i am trying to change my Komatzu forklift FD30h-3r from acid to lithium, the problem is the soc difference between quimical batteries, and when still have more than 50% of charge the forklift limited to turtle because he thinks the battery is low, can anyone help me to hack these setup to remove speed turtle limit ?
https://ibb.co/tLGDvTw

Thanks