Weird hole in head

[SpaceXPiston]

My 07 gs500f had a Camshaft cap incident so I got an 01 head off ebay. Theres what looks like a drilled hole by my B cam cap and im wondering what it's for and if I need to plug it since I don't have the same hole one mine

[The Buddha]

Your pic is too close up. I cant tell where it is. You may be better off trying a cam cap swap, but I hate hate hate to do that - however a drilled hole in a cam cap isn't "pluggable"
Cool.
Buddha.

[SpaceXPiston]

I had to zoom in because the picture upload size but I figured out it's apparently a gs500e head and it's for the tach

[The Buddha]

Oh yea in front - You could just put the fitting back in it and not run a cable.
Cool.
Buddha.

[The Buddha]

My 07 gs500f had a Camshaft cap incident so I got an 01 head off ebay. Theres what looks like a drilled hole by my B cam cap and im wondering what it's for and if I need to plug it since I don't have the same hole one mine

This is just a joke - and I'm kicking myself for taking this long to come up with it ...

Is it playing rock and roll music through the hole in its head ...

Listen close ... does it say "tequila" every few mins.

Cool.
Buddha.