tachometer question, help needed. Pics included!!!

[Stainbox12]

i bought a GSX a while ago, i bought it all beated, and i did a complete engine rebuild, howeveri bought it, without the tachometer working, its a 90 GSX, i saw a post a while ago about the noise filter, i took some pics, and i would like to know where to tap it to.. i took some pics, and i found in pic 1, a plug that wasn´t connected to anything, and pic 2, a cable that is not connected to anything, and it comes out from the middle of the injector harness area. Any info, on were to tap the noise filter, or to find if i dont have it, because i dont find it anywhere would help me a lot. also, if the plug that im mentioning in pic 1, is were the noise filter is tapped to.

Thanks in advance.

 

[Stainbox12]

here´s the pic of the cable that is not attached to anything

http://img220.imageshack.us/my.php?image=cable2ra.jpg

 

[Stainbox12]

here´s the first picture i added to the forum, that for some sort of reason is not displaying.

http://img226.imageshack.us/my.php?image=plug15wz.jpg

 

[luv2rallye]

Read these for the 90 tach problem:
http://www.dsmtuners.com/forums/showthread.php?t=147266
http://www.dsm.org/archives/1997/02/19970205.txt/1.html

 

[4g63tsiawd]

Here some sensor to check in that area. The knock sensor is under the intake manifold, its mounted to the block. Theres also a little sensor(I believe its the tach noise filter) that is mounted to the intake manifold support, if you reach your hand up underneith the intake you will fell the support. Do you still have the ac in the car. For that second pic, is that a single strand wire, whats the color of it also.