Clifford IntelliStart on a CE2 MK2 GTD

[GTD.]

Anyone done it?

Just got a Clifford Avantgard 4 cheap, had a concept 600 years ago on my old GTD, but it wnt wrong so I changed it to a Toad Ai606 but the siren has died so I got the Avantgard set up this has Black Jax same as my old system and has IntelliStart IV now I'm fairly sure it got a tach signal off the green wire going to my clocks on my old GTD but both manuals say I need a device that clips on the altenator to see RPM signal 

Can I just connect it to the tach wire or do I need to get an optional Alternator sensor?

Cheers

[gldgti]

since the tach is run from the alternator on the diesel, the wire that drives your GTD clocks is the signal you need