Booms cube-80

[Boomboy]

not really sure what to do here, i was just thinking instead of putting my return through the manifold i could use the 2 holes in the tank. the only thing i would be worried about it 1. that the CL is no longer a CL due to running through a manifold and 2. unless i put the nozzles pointing to the surface i would get alot of drainage from them, never used locline and was wondering if it would still drain all the way to that level.

[Boomboy]

Anyone know how to create a good syphon break in the return, considering that my 2 returns are quite a bit lower than the overflow?