This goes to the vac units on the ac/heater box and has a plug on the end. 3503938 A/C VACUUM HOSE & CONNECTOR 1977-79 H,N,F,G 5 26.40 Ready to buy but would like to see a pic of it and the plug on the end to confirm its what I need since there is so many odd things on certain 76/77 cars. Its the item with the red arrow pointed to it in the pic. I already have the short extension in the red circle. Thanks.