The leads of this connector may have become squashed, so make sure that they are straight and place the connector on the board. When it seats well, solder up the pins and clip off any excess. Now, the large connector J2 which is the serial port connector, has an even more nasty pair of 'pegs', so you need to make sure that the 9 pins are nicely straight before you push it down into the board. OK, we've waited long enough, let's put in the LED's. By the picture you can see which colors go where, and that each must be oriented with the flat side of the base to the right .
Insertion is easy.
Bend, solder, clip, all four. The most important part is the voltage regulator because it will convert the voltage from the wall transformer into a regulated voltage for the computer. It is also problematic because there are two different parts that might be included in your kit. The manual that you get with the LynX Kit should have a page regarding the differences between these two parts, but in general, the main thing is the polarity . Turn the part you have in the proper orientation, and insert it into the three holes which are in a straight line with each other.