1970 250/Rochester Monojet vacuum line question

[Love 70 Chevys]

Just got done rebuilding my carb and I want to put everything back together factory-like. What is this? (Arrow in first picture). The input line is from the vacuum advance on the distributor. The output line goes to the carb. Does it connect to the vacuum break (upper arrow in the second picture) or near the throttle adjustment screw (lower arrow in the second picture.) Any hints on how to test it to see if it still works? Thanks!

[Jason Banks]

The first arrow points to the TCS(Transmission Controlled Spark) Solenoid

See this:
http://repairguide.autozone.com/znet...52800836b1.gif

and this:
https://www.ebay.com/itm/transmissio...-/263099162178

[Keekstech Performanc]

Hey guys I was curious if the TCS solenoid is for auto, manual, or both?
I have a 72 250ci with this mounted behind the carb. Is this the TCS? It hooked to nothing currently so if it is that definitely will help my cause. Thanks.

[Love 70 Chevys]

From your pic, it is located where my throttle stop solenoid is, but that solenoid does not have any vacuum lines going to it. I can definitely see the two nipples for them, so I would say yes, that is the tsc solenoid.

[Keekstech Performanc]

Thank you for the response. I'm still waiting for my repair manual to come in the mail and was curious.