custom gauge help

hey ya'll im thinking about making my own gauge cluster. and this is my first car and havent learned much about working on it and stuff so bear with me lol, now when i purchase the spedo, tach, voltate etc gagues is there anything that i need to do connect them to where the stock ones would be? im thinking about doing something like this

but with out the boost and air fuel gague i borrowed this layout from AnotherA when he did his. thanks in advance for all the help! :-D