randoom hole in t25?
so i am in the process of rebuilding my t25 for my car. a little background it came off a redtop s13 sr20. so i started to clean everything up and take it apart and i noticed these two bolt holes one of which goes all the way threw the housing, i am just curious as to why this bolt hole goes all the way threw and if it is factory. is anyone else's t25 like this? i will prolly plug it with teflon and a small bolt, but im curious. here is a picture, the one that goes all the way threw is the top hole. thanks in advance