AX50 Trigger Adjustment?

[338LM_Sniper]

I have an Accuracy International AX50 and it has a 2 Stage Trigger. Just was wondering if there is a PDF or video on how to adjust the 2nd stage to a lower setting? This is a 2016 AX50 and not the newer AX50 ELR version if that makes a difference?

Thanks in Advance.