Front of the engine is most likely the water pump, it will drip from a "weep" hole on the underside of the pump if its seals are on the way out. Could also be any of the coolant hose connections, a visual inspection should help figure that out.

The coolant leaking from the rearwards area could be cabin heater hoses between the engine and the cabin heater core, look at the connections in and around the firewall area. If the coolant appears to be leaking from somewhere further rearward than the firewall area, you need to get under the car and get a look at the two heater box drains that outlet above the tranny behind the bellhousing area these are the two corrogated hoses not the rubber duck bill drains (these drain the front fan area of the heater box that rain water can get into). If that is the source of your coolant leak then it is most likely your heater core or the connections to it which are leaking.

The thing to do if you can't find the obvious leaks or you want to confirm the lapparent eaks is to pressure test the coolant system and observe the areas you identified as potential leaks. Usually at 20 PSI any leaks will manifest themselves pretty clearly.

Tranny fluid leaks at the front of the engine are most often the spring armoured tranny cooler hoses, or on the 124 OM 603 there is a steel pipe that runs from the top tranny fluid cooler connection of the tranny fluid cooler integral to the radiator, down to the connection of the armoured hose under and just behind the radiator. There is a small support bracket on that steel pipe, on the pipe's bottom horizontal leg, this is a frequent rust through/abrasion failure point that will leak tranny fluid.