OK, for the second question group you will have to write something like this into the equation question:
Code:
{sum(if(G2Q1_SQ001 == 'Y', 3, 0), if(G2Q1_SQ002 == 'Y', 3, 0), if(G2Q1_SQ003 == 'Y', 3, 0), G2Q2.value)}
Unfortunately somehow G2Q1_SQ001.value doesn't give us the assessment value (3 if ticked), but rather it gives 'Y'. I will file a bug report, because this is weird.
Please find my solution attached as LSS.
I have left the equations to be shown, so you can test and see what is happening and how they are changing values while you are ticking answers.
{ASSESSMENT_CURRENT_TOTAL} only works when a button has been pressed, so to have this working you need to put it one page after the last question that needs to be assessed, which I did by creating a third group. I also used an equation there, summing up the two previous equations, just to check if the calculations are right (and they are).
Funny enough, the ASSESSMENT_CURRENT_TOTAL seems to take the correct assessment value of '3' for the multiple choice question, while .value gives 'Y'. So I think this is definitely a bug.