Archived Turbo Oil Drain Bolt

[ProMac1K]

Does anyone know what the size/specs are on the two bolts that hold the oil drain tube on the turbo? I got the turbo put back on yesterday, and got my new battery cable ends on today. Fired it up, went out for a test drive to check wastegate setting, stopped on the highway to adjust the wastegate and found oil drops on the heat exchanger and on the AC line, looked up and the drain connection was damp. Found out tonight before work that there is no bolt in the hole closest to the block. It is a very slow leak. Doesn't leak at idle, just gets damp after you take it down the road. I had my dad put them in, and I was there first hand to see that he tightened the bolts. Don't know what happened to it. Would there be another hole nearby that it would have threaded into mistakingly? If anyone would know the size, or could check the size on a spare turbo, that would be great!