That bolt on the carb is a long hold-down bolt that just goes thru the carb body and screws into the intake manifold. A coolant leak there is odd, but there's a coolant passage from the manifold to the carb right next to that bolt hole, so perhaps the carb mounting gasket is leaking there, allowing coolant to creep up the bolt hole? Is that bolt even tight? I found one of those bolts was broken with the shaft just riding loose in its hole when I swapped to a Weber carb.

As for the leak at that coolant tee, could just be those hose clamps need tigtening, or maybe one of those hoses has developed a crack there and needs replacing, or maybe a pinhole leak in a hose is spraying onto it?