There isnt much to explain, there is tonnes of info about it on here. You just tape them up so you dont knock and damage the cover or to make the bocks look cool.
There is tonnes of info about this and lots of other mods too. Also a lot on other things too. Your best bet is to have a good read, and yes, it may be over several threads but it is there.
If you have any specific questions that you cant find answers to feel free to ask but asking for people to "explain" things probably wont get a good response because the info has probably been posted 5 times already