Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to connect a jamma harness [title] First thing you need is a jamma harness. [step] This is a standard edge connector with two rows of 28 pins used on almost all arcade machines. [title] The jamma harness has a standardised wiring code as follows : [step] The connector and board are usually' keyed' at the place where pin 7 would be, so that they will only go on one way.

Ending1: Most devices attach to a mechanical instrument, though. So unless you see something in it, it is best to watch it carefully to see how the jamma harness fit. Ending2: This is where the jamma harness is weak, so as not to cause physical trouble. The board is weatherproof to fit again. Ending3: Sometimes the connectors are not keyed and it is possible to put it on the wrong way around. [title] Physically push the connector onto your jamma board. Ending4: [title] Search online for jamma harnesses, or if you prefer different harnesses, you should consider buying one. [title] Go to the diagrams found at the top right.

Answer format: ending1/ending2/ending3/ending4