MATSUURA MC 760 V2 WITH OIL CHILLER

Hello all,
I recently received a MC 760. It came shipped with the oil chiller removed.
I need a little help from someone who has one of these. The 2 oil lines coming from the machine are disconnected. They look identical on the end fittings and I don't know which goes where on the chiller unit. I read somewhere that if they are hooked up wrong then the grease packed in the lower spindle bearing will be washed out ruining it. Can someone help me please?
TIA
Keith