Used a piece of 2" scrap timber as the spar jig block.
Used the fitting and drilled 2 x 1/4" holes using the drill press.
Aligned the jig with the predrilled guide holes with drill bits and then clamped the timber before mounting the hand drill to the bits and powering through to the other side.
All holes line up perfectly on the front and rear spar.
The hardware grade bolts of course will be replaced with AN bolts when it comes time to finish the job.