To set the TRIGGER in the correct location requires the insertion dial indicator into the magneto spark plug hole - the dial indicator MUST has a roller contact or roller ball on the end of the extension arm, due to the angular spark plug hole.
You only need to install the dial indicator into the magneto hole, since it is used to set both sides of the engine. Once the indicator reads correctly for the engine you are working on you simply move the TRIGGERS so that they are as indicated in the above diagram.
Once set in the proper location, set the trigger gap by using a feeler gauge, and set gap to .45 - .55mm (0,018-0,022 in.). Tighten taplite screws to 6Nm (53in.lb).

Rotax 447 - 1.65mm (.066in.) BTDC measured vertically
Rotax 503 - 1.73mm (.069in.) measured at a 30 degree angle
Rotax 582 - 1.95mm (.078in.) BTDC measured at an 18 degree angle
Rotax 618 - 1.48mm (.059in.) measured at an 18 degree angle

Caution: Whenever doing the ignition timing always check the triggers for continuity to make sure that they are not grounding out. The red trigger should measure 50 ohms while the red/white rigger should measure 130 ohms.

Copper wire ampacity table

Ampacities of copper wire, in free air at 30^o C:

======================================================== 
|                      INSULATION TYPE:                |
|         RUW, T           THW, THWN        FEP, FEPB  | 
|           TW               RUH            THHN, XHHW | 
======================================================== 
Size    Current Rating   Current Rating   Current Rating 
AWG     @ 60 degrees C   @ 75 degrees C   @ 90 degrees C 
======================================================== 
20 -------- *9 ----------------------------- *12.5 
18 -------- *13 ------------------------------ 18  
16 -------- *18 ------------------------------ 24  
14 --------- 25 ------------- 30 ------------- 35  
12 --------- 30 ------------- 35 ------------- 40  
10 --------- 40 ------------- 50 ------------- 55  
8 ---------- 60 ------------- 70 ------------- 80  
6 ---------- 80 ------------- 95 ------------ 105  
4 --------- 105 ------------ 125 ------------ 140  
2 --------- 140 ------------ 170 ------------ 190  
1 --------- 165 ------------ 195 ------------ 220  
1/0 ------- 195 ------------ 230 ------------ 260   
2/0 ------- 225 ------------ 265 ------------ 300  
3/0 ------- 260 ------------ 310 ------------ 350  
4/0 ------- 300 ------------ 360 ------------ 405  

* = estimated values; normally, wire gages this small are not manufactured with these insulation types.