Aligning rods and tightening belts

Hello Everyone

Finally my printer began to work. Not great, but working. When I command Home position I can hear rattling sound from rear left of the printer.

Y axis is not moving as good as X axis. Then I search the forum. Everyone says that adjusting rods and tighten belt. I can not understand how you move rods if these are not align. They have a fix position.
The only thing I can adjust is Pulleys.

If somebody here can give an idea where I could adjust the rods and tighten belts. My Y axis belt is little loose and I don’t know how to tighten this.

With regards
Ziglu5

Look in this link.
http://www.k8xxx-3dprinters.crimed.be/w/index.php?title=XY-Carriage_Alignment