Replacing capacitor on Emerson K55HXJGH-S667 Condenser fan motor. Motor leads are black, brown, and orange. Capacitor is 55/5MFD round 370 VAC with 3 sets of terminals marked C, HERM, and FAN. L1 power lead is direct from power block (orange wire) and purple wire comes from compressor which I assume is L2 as L1 and L2 wires go from power block to compressor. I am not sure how these wires connect to the capacitor. The condenser is a Rheem RAMB-018JAZ

L1 power lead is direct from power block (orange wire)
To C on capacitor.

purple wire comes from compressor
To Herm on capacitor

Wire from fan motor goes to "fan" on capacitor

Ok, that helps but the three lead from motor- what terminals do they connect to on the Cap. ( forgot to mention that wiring diagram on lid is illegible )

Two hots L1 and L2 come into contactor (what you are calling power block). They are really the same (120V to ground) just in opposite halves of the cycle. That gives you 240v between L1 and L2.
Out of the contactor, one lead goes to compressor and to fan. The capacitor is two capacitors in one. Other lead out of contactor goes to common of capacitor. Out of the compressor side of capacitor (Herm) goes to compressor, giving you 240V at compressor with proper capacitance.
Out of the fan side of capacitor (Fan) goes to fan motor giving you 240V to fan with proper capacitance.

Perhaps I am not understanding the question.

Power always goes to the Common ands Run terminals, Start goes to fan on the cap


If you cannot read the diagram you will need to ohm the motors leads, do you have an ohmmeter?
If so set the meter to ohms scale and grab any wire and read the values to the rest.
The wire that's highest to that one take it and read to all the rest, the 2 farthest apart leads will be Run and Start.

The remaining lead is Common, now go to common and the lead with the least resistance to it is run that is where 1 line of voltage goes to common on the motor and 1 to common on the cap the cap is the other and Start goes to the remaining run cap terminal saying fan.

If you cannot read the diagram you will need to ohm the motors leads, do you have an ohmmeter?
If so set the meter to ohms scale and grab any wire and read the values to the rest.
The wire that's highest to that one take it and read to all the rest, the 2 farthest apart leads will be Run and Start.

The remaining lead is Common, now go to common and the lead with the least resistance to it is run that is where 1 line of voltage goes to common on the motor and 1 to common on the cap the cap is the other and Start goes to the remaining run cap terminal saying fan