Hello - I'm hoping someone could shed some expertise. I have an older grove amz51 a45j. Serial A1993-011

A few weeks ago I lost both forward and reverse. I've replaced the drive controller joy stick with no luck and now onto troubleshooting the Parker coils. Upon investigation I noticed one of the Parker coils which is labeled SV4 has the red power coming out of it not hooked up to anything. At first I thought this would be an easy win but I'm stumped trying to figure out where this coil attaches to power. The connection block where the other coils attach is full.

I've tested every other coil with a multimeter and I'm getting a consistent 5-8 ohm reading.

The drive controller joystick also has controls for the wheels which is working so I'm ruling out any type of short in the bucket wiring.

I'm trying to find a manual for this thing but can't obtain one. Any help appreciated.