According to the manual I read on line, the TS2000 has separate linear
control and ALC input connections for HF and 6M. The HF control is a
relay and the 6M control is an Open Collector circuit.

Anyone have experience or suggestions on how best to interface this with
an Amplifier that covers HF and 6M with only one control line and ALC
output. The control voltage and current are within the limits of the
transceiver.

Would it make sense to just connect the two control lines in parallel?
Not knowing the internal circuitry I am not sure what isolation might be
needed for the ALC lines.

FWIW I went to the Kenwood site and tried the Contact Us link - it went
nowhere. Is there an email address to try this question on Kenwood?
John