I am in the process of reassembling my 97 LC 40th AE. I'm putting the two thermostat housings on, but it looks like there should be three studs and one bolt on the 'guide where the heater pipe bolts to. If I use 4 studs, it looks like it will be impossible to reattach the A/C line. Amayama parts diagram lists 3 studs, but no mention of a bolt. FSM isn't very helpful either. If anyone has a picture, that would be helpful. Thanks.