hi guys i need some help.have a 1993 rx7 twin turbo that i blow the engine so i am installing a used engine with a transmission from the junk yeard,my origninal tranny and engine are automatic and i am putting a engine and transmission combo that is 5 speed i have all the computers and wireing for the engine but as i whent to plug in the computer th the under dash wireing some plugs are diffrent sizes has any one done any thing like this and how did you get by the wireing harness on the car side????

 

Here's a post about the wiring issues doing the swap:

https://www.rx7club.com/showpost.php...3&postcount=51