I think I just caught a glimpse of the ones you mean by using my phone flashlight. I do have a big maglight which I would use if I could be bothered to get out of bed (I have no drugs

) . I could just about see them, but couldn't really feel them, although I have been lying down for a LONG time... I guess after a hot bath/shower and/or exercise you can feel them? I've never looked there for veins before only ever looked in my calf, found one but never managed to hit the cunt.
Do you hit those ones with a 1ml? I don't know the specs of the gauges/lengths but here in UK for the 2ml/3ml barrels we get a choice or orange blue or green screw on heads, orange is thinnest and what I use for IV mainly. It's thicker than a 1ml, blue is what I've used for IM. I think green is the same thickness as blue but longer...