Type 1 pressure relief valves

[Scotts73SB]

Hey guys -
Quick question.. the oil pressure relief valve that has the groove in it...does that go to the Flywheel side or the pully side of the 2 pressure relief valves.
The directions i have say "Put the pison with the groove on it on front" so its kinda vague to say the least.
The one withe the pulley side has the long spring.(rear of engine)
The flywheel side has the short spring.(Front of engine)
This is a dual relief type 1 case.
1 pressure relief piston is smooth and looks like a piston.
1 pressure relief piston has a groove in it.
Thanks in advance!
- Scott