Help with AEM gauge

MSP_03_FL

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2010 Mazdaspeed 3
I tried installing the AEM gauge today before work so everything was working fine until i got to the end. Wheres the best place to go through the firewall? I have a feeling the wire is to short and it doesnt make it to the J-pipe.

Here are the pictures of where I put the gauge and how much length is left.

Also, are there extensions for this harness?

Thanks.
 

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Did you buy this unit new or used? I just installed a new AEM wideband gauge this past weekend and the cable had plenty of length to reach the J-pipe, with cable to spare. The gauge was placed close to where yours is now...
 
I bought it used so i guess im missing a length of cable. Where through the fire wall did you send it?

Which cable am I missing?
 
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