Orange box ignition wiring

[0791ADUC 1970]

Are these the correct wires circled in red that go to the negative side of the coil. One wire is black with a yellow tracer from the orange box the other is gray with a black tracer from terminal 20 on bulkhead connector. I’m installing an aftermarket Tachometer and want to use the wires in the harness to do it. I’m also going from the tachometer directly to terminal #20 on the dash side of the fuse block. This is a new engine wire harness from M&H, none of the wires are labeled as to where they go. Thanks for any help!

 

[Vaanth]

Are these the correct wires circled in red that go to the negative side of the coil. One wire is black with a yellow tracer from the orange box the other is gray with a black tracer from terminal 20 on bulkhead connector. I’m installing an aftermarket Tachometer and want to use the wires in the harness to do it. I’m also going from the tachometer directly to terminal #20 on the dash side of the fuse block. This is a new engine wire harness from M&H, none of the wires are labeled as to where they go. Thanks for any help!

View attachment 136631View attachment 136632

Yes, the wires circled in red connect to the negative (-) terminal on the ignition coil. The gray wire with tracer from the bulkhead terminal #20 is the tachometer lead.