Hi jarro_2783,
the pups are the wrong way around. The higher sides go towards the bridge so that the pups follow the line of the strings when they are on.
The saddles are usually reversed for the 2 halves (which enable the high strings to be shorter and the bass strings to be longer to allow for greater intonation range.
As for the screws, either way works apparently - I have a LP where the screws are on the tail piece side, and a Epi LP where they are on the neck side :confused:). And both ways are annoying!