Banana Plugs too narrow

If the have the Z ends you could try widening then with a pair of needle nose pliers.

Can I simply remove the plugs and use bare wire? 
Can I insert the plugs in the binding posts where the bare wire would go? 
The wire and plugs looked normal to me:
Tuneful cables Belden 9497, Cotton jacket, silver beryllium BFA.
The owner/manufacturer was very nice and spent an inordinate amount of time with me, but his wire simple had no connection.  It just slipped in and out of the hole in the binding post.
Thanks

BTW, the humor concerning engorgement is acknowledged, but really, not very witty.  Sorry.  My assumption is males who are fixated on their appendage, must be very insecure about said organ. 

Unscrew the binding post. If in the post there is a hole, put the bare end of the speaker cable into the hole and tighten the nut. If it doesn't have a hole, take the bare wire and wrap it around the post and tighten the nut. Make sure they are tight.