[Tigers] Temp sender plug on stock intake

[awtiger at cox.net]

Guys:

I am missing the plug that goes in the intake hole on my Tiger where a temp sensor would go on a regular application.  Is there anything special about the plug?  Is it just a square-headed plug or an allen head?  I'm trying to adhere to originality and definitely want to install the original style of plug.  Would someone please point me in the right direction?

Thanks,
Andy Walker
Edmond, OK
B382001600LRXFE
TAC #740