What is the best Apple XDR P3 1600 reference monitor display setting for exporting to a non DCP cinema projector?

I've have a codec conundrum I need help with. The small theatre where I am screening my documentary has a non DCP Rec 709 projector. To color grade the documentary edited in for this venue I need to match the projector's color profile to the correct display setting of my Apple XDR P3 1600 monitor. The color temperature is 6500 and the maximum brightness is 80%. Like all digital projectors, it has a rec.709 profile; however it is unknown whether the gamma is 2.4 or 2.6. I've been in touch with the manufacturer and they shared the following colormetric info:

Can any of you Final Cut Pro/Davinci expert colorists/math wizards determine from the color points above if I should be exporting to Rec709 2.4 or 2.6?

I'm guessing that the HDTV (BT.709-BT.1886) is the correct reference monitor setting as the two Digital Cinema options are for high end DCP XYZ cinema projectors.