It shouldn't be difficult to determine which way your motherboard should be placed inside your case. All BX boards should have the same layout generally, with some small difference in placement of power connectors.

You may want to put in your new Celeron first onto your board. I don't have a picture of a bare board with the CPU. Hope you can orientate and visualize the position.

There are a couple of things to take note. Do not be too gentle on the Celeron. My first attempt to start up failed was due to the CPU not sitting fully into the slot. If you take a close look at the 'U-shape' at the bottom of the CPU, that MUST not have have any gap when sitting in the slot 1.

The fan that comes with your boxed Celeron is good enough for overclocking. Don't worry about getting better fans.

Other comments : Notice the small brown stick at the bottom touching the CPU ? That is one of the unique features of Chaintech 6BTM. That stick is a CPU temperature sensor, and it gives much more accurate readings of the temperature of your CPU as it is touching it. So far other boards' sensor are flat on the board.

This is more pertinent to the casing. Notice my power supply fan is actually blowing at the CPU ? You may say that this will increase the temperature of the CPU. I've asked that question before but no one can give me an answer. So I took the risk and tried. Actually the heat from the power supply is not very hot. The blast from the strong fan actually feels quite cool to the touch. The temperature of my CPU (not motherboard) hovers around 38 - 41 degrees and the motherboard at 34 - 37 degrees depending on usage. It will be better to get another exhaust fan near that area to suck the hot air out of the case. (Which is what I intend to do)

From this picture, you will also notice that the rams are fitted right in front of the CPU.