F20B in to Prelude, but how?

[HardcoreGangstah]

yo guys,

i baught a couple a weeks ago a swap.
it's a F20B and i want in to my Prelude.
but i have now some troubles with the cableboom and ecu.
can someone give me a picture of the f20b ecu?
i've got 4 holes but from the engine to the ecu i have 3 plugins.
what function does the 4th?

Greetz HG

 

[formby]

you need a civic> h22 kit

 

[ROLI]

I was thinking about doing the same thing to my prelude. Is it really hard to get it in there? Will it even fit? If it does what are the thing you need to get it done?