Pipe T hackery

Long single wire

Single wire connector

Single wire connector

2 wire connector

2 wire connector
I want to preface this post by saying im a virgin please be gentle. Anyway i recently bought a '92 pickup (22RE, 5SPD, 2WD, 200,900mi) and i have noticed i have a small collection of lonely electrical connectors and a hodge podge pile of plumbing bits on the front of the block. Im going to try to link pictures but if they don't load I'll figure something out.
Firstly i have what appears to be an aftermarket water temp gauge wire, atleast i assume thats what it is since the dash gauge doesnt work and its plumbed into a coolant passage. I was just hoping for the confirmation from the hive mind. Also if anyone knows the connection on the bottom of this pipe t i would appreciate that.

https://i.imgur.com/qDniRJF.jpeg
https://i.imgur.com/M2d2yxm.jpeg

Secondly i found two lonely connectors, picture 1/2 (hopefully) is a single wire connector black/white trace. Picture 3/4 (again hopefully) is a two wire blue and black/red trace.

https://i.imgur.com/nEFWpxH.jpeg
https://i.imgur.com/e0cnFcD.jpeg

https://i.imgur.com/6qIZzBn.jpeg
https://i.imgur.com/eLvwSm8.jpeg


As an aside the truck also sounds like it has a hawg ass cam at idle but im currently chalking that up to a misfire.

Thanks in advance and sorry about any formatting or picture linking problems, im new and doing this on mobile

 

Alright there's pictures now but i royally f'd the formatting my apologies