Here you go:
https://hybridautomotive.com/collect...ioning-package
Just get that, install it, do 2 discharge/recharge cylces.
First one to 130v, then recharge for ~18 hours.
Second one discharge to 60v, recharge for ~28 hours.
If the previous owner didn't use a grid charger on the pack, I figure you have about a 90-95% chance the pack will come back to life.