A bit late for me to reply but just wanted to say thank you for responding. I guess that solution would prevent me from also charging the Hi-Book Pro at the same time (or maybe not, I’m not sure what a type-c OTG adaptor looks like, will Google), but maybe that is not neccessary for most car trips.
Unfortunately I’m having problems with the HiBook Pro and have requested a refund, I’ll start a new thread on that because I could use some advice.
Thanks again