In the editor you will be able to choose the attributes (i.e finishing) of the player. So physical(MAX 5) meant the best 5 physical attributes that person wants for that particular player. Normally you should put 20 for those attributes, as at the start you do not have a high CA and the editor will automatically reduces that particular attribute to normally 15 ( so that the stats matches the CA of the player)
BTW did you even try out the editor and try making a player first? Once you try it it will be very easy to understand.