rear crank seal

just fitted new front crank seal and sump gasket and she is all bone dry now...except one place!

I have nothing coming out of bell housing drain plug but it appears there is a leak between back of engine and bell housing plate.

I got a good rtv seal on sump and bottom of t seals but I'm guessing the small leak must be from rear crank seal... do I assume correctly?

I can live with it though, 1 drip per 2 days at present

rear main oil seal can leak as can the joint between rear main bearing cap and rear housing ,silicone helps before fitting flywheel housing as does 200 tdi rear gasket for 5 bearing engines