Best to use an inch-lbs torque wrench.
For reference 60 inch lbs = 5ft lbs or 6.7791 nm.
However, as Andy has said, the bolts have to be tightened down following a specific sequence.
If you require this sequence, then let me know.
Here you go.
Lubricate all the linkages and make sure that the micro switches are good.
Does it close with a little bit of manual help?
Also engine has to be running and your battery in good condition.