Just to update in case this benefits anyone else down the road ...
I found out that the two clear rubber hoses have copper "ends or inserts" where they go into the 2" water manifold. The purpose is to alert the owner of corrosive water that is eating away at the heat pump copper piping. So when/if the copper ends erode away water will go into the tubing and dump on the ground under the heat pump to alert the owner (to start saving money). Raypak says they don't use this detection method anymore and I can safely plug the drain hose. Of coarse the corrosive water that has eaten away the copper ends has also been eating the inside of the copper heat coil too - so a new heat pump (or replacement coil) is going to be needed at some point.

PS. My water is corrosive - it requires constant attention. With the Salt Cholrinator system I use I find my PH levels are always high. I have to add a 1/2 gallon of muratic acid once a week (to 15,000 gal water) to keep Ph around 7.5. Now I am seeing the results of not keeping on top of it.