Although I'm not an aerospace expert I think OP is a bit confused. Most engines are mounted using a front and a rear bracket (and a third for bigger engines), and each bracket uses 4+ bolts.
Here's the forward engine mount for a B737NG
http://www.atirepairstation.com/737-ng-forward-engine-mount-...
And here's the aft mount
https://www.atirepairstation.com/737-ng-aft-engine-mount-ass...
And here's a well-written post about this very same myth as it relates to the 737NG, describing exactly how it's all put together.
https://aviation.stackexchange.com/questions/23151/how-are-e...