Safe to use Phoenix IP43 trickle charge output as Orion XS remote turn on?

I have an Orion XS charging an auxiliary battery bank, and would like it to turn on when plugged into shore power. I have a Phoenix IP43 charger that charges the house bank and wondering if there are any concerns with using its starter battery trickle charge output to enable the a Orion via the remote turn-on HIGH input?

Thanks in advance.

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