Dohc swap help

[xayevier]

for a SOHC to DOHC swap do you need the DOHC harness that goes to the battery and the alternator, or will the SOHC one work?

[SA56334]

Anyone have an answer to this? The plug thats mounts under the fuse block and connect to lower harness is different. sohc bay harness is a 4 pin plug, and dohc lower is a 2 pin. what is it? Is it necessary?