I have been doing extensive searching on where to install my oil pressure sensor. There are 2 places where people say to replace the stock oil pressure sender.

1:Right below the oil filter and to the left (if your looking from the front of the vehicle)

2: back of head driver's side pointed towards the firewall on an angle.

Are these both correct? Are they both indeed oil pressure senders? If so the one towards the firewall seems like the way to go as the one below the oil filter looks like I would need to remove the intake manifold to get to.

Pics for reference
1:http://www.cobaltss.net/gallery/showimage.php?i=34051&c=newimages

2:http://i667.photobucket.com/albums/vv31/Transporter7220/DSC04839.jpg