Where is the pump on an AIO cooler?

[unspeakable]

I can't find where the pump is on an AIO cooler. Is it built into the cooling block. I am working on an extremely slim build and I use AIO coolers due to such little space (also for low noise). I know how big all the pieces are, but in all the pictures, I can't find where or what the pump is. The pump I will be using is the Cooler Master Masterliquid lite 120.

 

[WildCard999]

It's built into the heatsink (cooling block).