Rear Shocks

Thought Id put he rear shocks on today, but as usual theres always a problem .
Passenger side seems ok in first pic but on drivers side the bolt is not long enough to go through, dont know why , is it just a case of a longer bolt, or is there something wrong here ??

I am sure it is not this simple but do you have the bush the correct way around, shock bushes are not symmetrical and the longer taper goes into the shock. If it is the correct way around it will just need compressing to get the nut started and once started can then be tightened down. the bottom mount with the split pin is even more fun to compress!