Can Dell 170l motherboard fit Dell Dimension 2400

hi how are you i have purchase a dell 170l mother board looks like there are two kinds it has one that works with the sata tats the one i have i bought it to replace my dell 2400 but cannot mount it please help as the lining up of screws are different i need to know how to mount it it only has one screw i think it may short if not mounted properly.

2 the front panel lights how to connect the lights as the pins looks different
thanks.
 
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