2001 Toyota Prius small coolant leak from the hybrid system reservoir

Hello everyone! I've got a concern with my 2001 Prius. Every once in a while I have to refill the coolant reservoir for the hybrid system but it leaks so little I can't find any leaks under the car or anywhere else except for this one coolant junction that looks a bit pink.

I was wondering if anyone else has had this problem, I'm not sure if the inverter pump was ever replaced on this vehicle as I only bought it recently (it's over 202k miles and a salvage title) please let me know if anyone else has had to deal with this! Thank you.

Attached is a picture of my engine bay and the pink coolant hose.