:: Duh :: You wrote "glow connector", I interpreted it wrongly.
The BEST out there is the McDaniel, now marketed by Sullivan....the "Pro Head Lock", and it's stainless steel barrel, push-twist to lock. Eventually it wears out, but it's pretty short, and light, so as long as it's not hitting the sides, lasts a long time...

Periodic cleaning with spray carburetor cleaner (not connected to the battery, of course) keeps things conductive.... I have two, and they've lived well.