Dumb questions on radiator connections?

[Bear]

I have a new 05' Siverado radiator and it fits very well after some modifications to my core support. Noticably this new radiator is very different from my old factory one. First off it has no radiator cap for filling it up. I am familiar with the upper and lower hoses along with my transmission connections. The other connections however, I am not too sure about. Can anyone help with this?

[RPM Graphics]

the newer radiators fill through the overflow/reservoir tank. why not just use your original radiator?

[Bear]

The original is damaged beyond repair due to one of my airman backing his dodge diesel up into my front bumper at a very rapid pace. I aquired a brand new 05' radiator and fans for cheaper than the price to replace my factory radiator, so it seemed like a good idea at the moment, but I am not sure of all the hose connections on this new radiator. Besides, my old radiator gave me cooling issues when towing here in the Black Hills and I think this much larger radiator and dual efans will resolve that issue of pulling a 4800lbs camper over this very hilly terrain.

[Blackpearl]

The hose on the left goes in the drain bucket for when you change the fluid. Otherwise it just sits. The top one on the right goes to the coolent overflow, bottem goes to the throttle body. That's what it all is on my 99 anyway.

[Bear]

That clears up the radiator, thanks for the reply and appreciate the help.