Car - adm ae86

motor - smallport 4age

use - engine swap

problem - I am converting this from 4ac to 4age and extending the wiring loom by 80cm. I was wondering if i could solder all 5 grounds together from the ecu and running another thicker wire to the engine block instead of running one wire for each? can i also do this for the two on ignition power feeds too? and can i connect the neutral start switch to +ign too or do i just not connect it to anything at all?

occurs/started when - i ran out of wire

personal situation (if applicable)- ??

Thanks in advance